The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A049883

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A049883

Primes in the Jacobsthal sequence (A001045).
(history; published version)

#30 by Michel Marcus at Wed Apr 22 11:38:47 EDT 2020

LINKS

Silvio Gabbianelli, <a href="/A049883/a049883.txt">href="/A049883/b049883.txt">Table of n, a(n) for n = 1..25</a>

STATUS

proposed

Discussion

Wed Apr 22

11:39

Michel Marcus: so I have removed the faulty line, and please try again to upload your file as a b-file (check this is a b-file checkbox) :  ok ?

#29 by Silvio Gabbianelli at Wed Apr 22 11:23:37 EDT 2020

STATUS

editing

Discussion

Wed Apr 22

11:36

Michel Marcus: I see 2 problems

11:37

Michel Marcus: Problem 1 : click in #29 of #29 by Silvio Gabbianelli at Wed Apr 22 11:23:37 EDT 2020 : this shows the page look if it was publised now : do you see that your line does not look ok

11:38

Michel Marcus: Problem 2 : looking at your file, it seems to me that your intent was to upload a b-file, but you forgot to check "this is a b-file" so it arrived as an a-file and so I did not replace the existing b-file

#28 by Joerg Arndt at Tue Apr 14 10:42:14 EDT 2020

STATUS

proposed

Discussion

Tue Apr 14

10:56

Michel Marcus: Please go to your preferences and check "Enable e-mail"

10:56

Michel Marcus: A308829 : please do not nuke existing published sequences

Wed Apr 15

04:53

Silvio Gabbianelli: In order: It seems that the file was uploaded Michel;
Joerg this is another series, my contribution is for this one 049883;
308829 I found an edit draft redy for submission, it seam fine to me so I submitted, sorry I thought it was a new series item.

Wed Apr 22

08:34

OEIS Server: This sequence has not been edited or commented on for a week
yet is not proposed for review.  If it is ready for review, please
visit https://oeis.org/draft/A049883 and click the button that reads
"These changes are ready for review by an OEIS Editor."

Thanks.
  - The OEIS Server

#27 by Silvio Gabbianelli at Tue Apr 14 08:14:10 EDT 2020

STATUS

editing

Discussion

Tue Apr 14

09:19

Michel Marcus: there is something wrong in your line: <a href="/A049883/a049883.txt">href="/A049883/b049883.txt">

09:20

Michel Marcus: you forgot to click in the checkbox : this is a b-file, so you got an a-file

09:20

Michel Marcus: please try again

10:42

Joerg Arndt: See A107036, from where one could trivially compute the first 40 terms.

#26 by Silvio Gabbianelli at Tue Apr 14 07:24:27 EDT 2020

LINKS

STATUS

approved

#25 by Bruno Berselli at Wed Nov 20 09:45:05 EST 2019

STATUS

reviewed

#24 by Joerg Arndt at Wed Nov 20 08:28:20 EST 2019

STATUS

proposed

#23 by Michel Marcus at Wed Nov 20 02:32:26 EST 2019

STATUS

editing

#22 by Michel Marcus at Wed Nov 20 02:31:53 EST 2019

COMMENTS

All terms, except a(2) = 5, are of the form (2^p + 1)/3 - the Wagstaff primes A000979(n) = {3, 11, 43, 683, 2731, 43691, 174763, ...}.

Indices of prime Jacobsthal numbers are listed in A107036(n) = {3, 4, 5, 7, 11, 13, 17, 19, 23, 31, 43, 61, ...}.

STATUS

reviewed

#21 by Joerg Arndt at Wed Nov 20 01:42:41 EST 2019

STATUS

proposed