A156509 - OEIS

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A156509

Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 45.

2, 12, 390, 12963, 1881506, 1336889688, 9293294524192, 249490585063875516 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,1`
	CROSSREFS	`Sequence in context: A012547 A009706 A012551 * A051009 A060942 A072446` `Adjacent sequences: A156506 A156507 A156508 * A156510 A156511 A156512`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net) Feb 09 2009`

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Last modified February 16 06:39 EST 2012. Contains 205861 sequences.