The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A069483

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A069483

Largest prime factor of prime(n+1)^2 - prime(n)^2.
(history; published version)

#11 by Michael De Vlieger at Sun Nov 12 11:46:04 EST 2023

STATUS

proposed

#10 by Michel Marcus at Sun Nov 12 11:36:01 EST 2023

STATUS

editing

#9 by Michel Marcus at Sun Nov 12 11:35:56 EST 2023

COMMENTS

a(n) = A006530(A069482(n)).

LINKS

R. Zumkeller, <a href="/A069483/b069483.txt">Table of n, a(n) for n = 1..1000</a>

FORMULA

PROG

CROSSREFS

Cf. A069485.

STATUS

approved

#8 by Harvey P. Dale at Sun Jan 17 10:48:01 EST 2016

STATUS

editing

#7 by Harvey P. Dale at Sun Jan 17 10:47:57 EST 2016

MATHEMATICA

STATUS

approved

#6 by Russ Cox at Fri Mar 30 18:50:20 EDT 2012

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 29 2002, Aug 05 2007

Discussion

Fri Mar 30

18:50

OEIS Server: https://oeis.org/edit/global/246

#5 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010

LINKS

R. Zumkeller, <a href="b069483.txt">Table of n, a(n) for n = 1..1000</a>

KEYWORD

nonn,new

#4 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

LINKS

R. Zumkeller, <a href="http://www.research.att.com/~njas/sequences/b069483.txt">Table of n, a(n) for n = 1..1000</a>

KEYWORD

nonn,new

#3 by N. J. A. Sloane at Fri Jan 09 03:00:00 EST 2009

KEYWORD

nonn,new

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Mar 29 2002, Aug 05 2007

#2 by N. J. A. Sloane at Sat Nov 10 03:00:00 EST 2007

DATA

5, 2, 3, 3, 3, 5, 3, 7, 13, 5, 17, 13, 7, 5, 5, 7, 5, 3, 23, 3, 19, 3, 43, 31, 11, 17, 7, 3, 37, 7, 43, 67, 23, 5, 5, 11, 5, 11, 17, 11, 5, 31, 3, 13, 11, 41, 31, 5, 19, 11, 59, 5, 41, 127, 13, 19, 5, 137, 31, 47, 5, 7, 103, 13, 7, 7, 167, 19, 29, 13

LINKS

EXAMPLE

A069482(12) = A000040(13)^2 - A000040(12)^2 = 41^2 - 37^2

= 1681 - 1369 = 312 = 2*2*2*3*13, therefore a(12) = 13.

KEYWORD

nonn,new

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Mar 29 2002