A061525 - OEIS

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A061525

Surround numbers of an n X 2 rectangle when n is odd.

83, 361, 951, 1997, 3667, 6153, 9671, 14461, 20787, 28937, 39223, 51981, 67571, 86377, 108807, 135293, 166291, 202281, 243767, 291277, 345363, 406601, 475591, 552957, 639347, 735433, 841911, 959501, 1088947, 1231017, 1386503, 1556221 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`See A061524 for even n.`
	LINKS	`E. J. Friedman, Math. Magic: May, 1999`
	FORMULA	`a(n) = (n^4 + 32n^3 + 278n^2 + 656n + 361)/16 when n is odd.`
	CROSSREFS	`Cf. A047875 A061524.` `Sequence in context: A141570 A031433 A177099 * A160359 A142496 A142560` `Adjacent sequences: A061522 A061523 A061524 * A061526 A061527 A061528`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), May 03 2001`
	EXTENSIONS	`More terms from Larry Reeves (larryr(AT)acm.org), May 07 2001`

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Last modified February 15 17:13 EST 2012. Contains 205828 sequences.