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A125511 Octagonal numbers of the form C*(3C - 2) with 3C - 2 = k^2 and C a composite number. +0
1
96, 225, 1408, 3400, 9633, 12936, 22016 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Cf. A124106.

Sequence in context: A115437 A110231 A108609 this_sequence A124106 A062027 A048189

Adjacent sequences: A125508 A125509 A125510 this_sequence A125512 A125513 A125514

KEYWORD

nonn

AUTHOR

Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Jan 19 2007

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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