The On-Line Encyclopedia of Integer Sequences (OEIS)

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Revision History for A136345

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A136345

Sums of exactly two positive octagonal numbers A000567.
(history; published version)

#7 by Alois P. Heinz at Sun Jun 19 15:00:13 EDT 2016

STATUS

proposed

approved

#6 by Giovanni Resta at Sun Jun 19 14:48:04 EDT 2016

STATUS

editing

proposed

#5 by Giovanni Resta at Sun Jun 19 14:47:41 EDT 2016

DATA

2, 9, 16, 22, 29, 41, 42, 48, 61, 66, 73, 80, 86, 97, 104, 105, 117, 130, 134, 136, 141, 154, 161, 173, 177, 184, 192, 197, 198, 216, 226, 229, 233, 241, 246, 265, 266, 272, 281, 288, 290, 301, 309, 320, 321, 342, 345, 349, 352, 358, 362, 376, 381, 401, 406, 409

EXTENSIONS

Missing term (80) from Giovanni Resta, Jun 19 2016

STATUS

approved

editing

#4 by Russ Cox at Fri Mar 30 18:40:44 EDT 2012

AUTHOR

_Jonathan Vos Post (jvospost3(AT)gmail.com), _, Dec 25 2007

Discussion

Fri Mar 30

18:40

OEIS Server: https://oeis.org/edit/global/228

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

COMMENTS

For octagonal numbers within this sequence, see: A136346. This is to octagonal numbers A000567 as A051533 is to triangular numbers A000217, and as A000404 is to squares A000290, and as A117104 is to heptagonal numbers A000566.

KEYWORD

easy,nonn,new

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

KEYWORD

easy,nonn,new

AUTHOR

Jonathan Vos Post (jvospost2jvospost3(AT)yahoogmail.com), Dec 25 2007

#1 by N. J. A. Sloane at Sun Jun 29 03:00:00 EDT 2008

NAME

Sums of exactly two positive octagonal numbers A000567.

DATA

2, 9, 16, 22, 29, 41, 42, 48, 61, 66, 73, 86, 97, 104, 105, 117, 130, 134, 136, 141, 154, 161, 173, 177, 184, 192, 197, 198, 216, 226, 229, 233, 241, 246, 265, 266, 272, 281, 288, 290, 301, 309, 320, 321, 342, 345, 349, 352, 358, 362, 376, 381, 401, 406, 409

OFFSET

1,1

COMMENTS

LINKS

Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/OctagonalNumber.html">Octagonal Number</a>.

FORMULA

{A000567(i) + A000567(j), i, j > 0}. {i*(3*i-2) + j(3*j-2), i, j > 0}.

CROSSREFS

Cf. A000567, A136117, A136346.

KEYWORD

easy,nonn

AUTHOR

Jonathan Vos Post (jvospost2(AT)yahoo.com), Dec 25 2007

STATUS

approved