| 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
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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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.
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LINKS
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Eric Weisstein's World of Mathematics, Octagonal Number.
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FORMULA
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{A000567(i) + A000567(j), i, j > 0}. {i*(3*i-2) + j(3*j-2), i, j > 0}.
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CROSSREFS
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Cf. A000567, A136117, A136346.
Adjacent sequences: A136342 A136343 A136344 this_sequence A136346 A136347 A136348
Sequence in context: A067547 A083783 A031238 this_sequence A017005 A131189 A011193
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KEYWORD
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easy,nonn
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AUTHOR
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Jonathan Vos Post (jvospost2(AT)yahoo.com), Dec 25 2007
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