A159359 - OEIS

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A159359

Number of nXn arrays of squares of integers summing to 5

12, 198, 4608, 53730, 378252, 1909236, 7628544, 25628076, 75297420, 198807114, 481029120, 1082267550, 2289691404, 4595197320, 8809614336, 16225724664, 28845544716, 49690719342, 83218759680, 135872231418, 216792905868 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,1`
	LINKS	`R. H. Hardin, Table of n, a(n) for n=2..100`
	FORMULA	`Empirical: n^2(n^2-1)(n^2+2)(n^4-11n^2+48)/120. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 11 2009]`
	CROSSREFS	`Sequence in context: A066230 A048667 A115865 * A119864 A036240 A133242` `Adjacent sequences: A159356 A159357 A159358 * A159360 A159361 A159362`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net) Apr 11 2009`

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Last modified February 15 21:05 EST 2012. Contains 205855 sequences.