A156488 - OEIS

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A156488

Number of nXn arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 28.

6, 0, 78, 163, 58704, 590400, 202480300, 9256081380, 4014312232560 (list; graph; refs; listen; history; internal format)

	OFFSET	`4,1`
	CROSSREFS	`Sequence in context: A191688 A051767 A199044 * A057399 A145223 A072129` `Adjacent sequences: A156485 A156486 A156487 * A156489 A156490 A156491`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net) Feb 09 2009`

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Last modified February 14 08:01 EST 2012. Contains 205604 sequences.