A156493 - OEIS

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A156493

Number of nXn arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 32.

1, 0, 2, 6, 72, 804, 78655, 960648, 232585695, 21668424870 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,3`
	CROSSREFS	`Sequence in context: A171582 A152885 A052613 * A117515 A085865 A061296` `Adjacent sequences: A156490 A156491 A156492 * A156494 A156495 A156496`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net) Feb 09 2009`

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Last modified February 17 06:13 EST 2012. Contains 205991 sequences.