A156462 - OEIS

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A156462

Number of nXn arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 15.

22, 0, 3200, 2952, 1651208, 6328576, 2727888448, 31390349120, 15449498784320, 512365063156800 (list; graph; refs; listen; history; internal format)

	OFFSET	`4,1`
	CROSSREFS	`Sequence in context: A104787 A023922 A022064 * A040488 A040489 A040490` `Adjacent sequences: A156459 A156460 A156461 * A156463 A156464 A156465`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net) Feb 09 2009`

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Last modified February 17 11:46 EST 2012. Contains 206011 sequences.