id:A014641 - OEIS Search Results

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Odd octagonal numbers: (2n+1)(6n+1).

+0
5

1, 21, 65, 133, 225, 341, 481, 645, 833, 1045, 1281, 1541, 1825, 2133, 2465, 2821, 3201, 3605, 4033, 4485, 4961, 5461, 5985, 6533, 7105, 7701, 8321, 8965, 9633, 10325, 11041, 11781, 12545, 13333, 14145, 14981, 15841, 16725, 17633, 18565, 19521, 20501, 21505 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Cf. A000567, A014642, A014793, A014794.` `Sequence in context: A041864 A041866 A020211 this_sequence A089115 A020309 A048713` `Adjacent sequences: A014638 A014639 A014640 this_sequence A014642 A014643 A014644`
	KEYWORD	`nonn`
	AUTHOR	`Mohammad K. Azarian (ma3(AT)evansville.edu)`
	EXTENSIONS	`More terms from Patrick De Geest (pdg(AT)worldofnumbers.com). Better description from N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research