A061524 - OEIS

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A061524

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

224, 705, 1600, 3065, 5280, 8449, 12800, 18585, 26080, 35585, 47424, 61945, 79520, 100545, 125440, 154649, 188640, 227905, 272960, 324345, 382624, 448385, 522240, 604825, 696800, 798849, 911680, 1036025, 1172640, 1322305, 1485824, 1664025 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,1`
	COMMENTS	`See A061525 for odd n.`
	LINKS	`E. J. Friedman, Math. Magic: May, 1999`
	FORMULA	`a(n) = (n^4 + 32n^3 + 344n^2 + 768n + 400)/16 for even n.`
	CROSSREFS	`Cf. A047875 A061525.` `Sequence in context: A202442 A094209 A158227 * A156813 A146745 A015048` `Adjacent sequences: A061521 A061522 A061523 * A061525 A061526 A061527`
	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 13 20:19 EST 2012. Contains 205553 sequences.