id:A156384 - OEIS Search Results

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Number of 4X4 arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to n.

+0
1

1, 2, 2, 2, 3, 2, 2, 2, 2, 4, 4, 2, 4, 4, 0, 2, 3, 4, 6, 4, 4, 2, 4, 2, 2, 6, 4, 6, 6, 2, 0, 4, 2, 6, 8, 2, 7, 6, 4, 2, 4, 4, 6, 6, 4, 6, 0, 4, 4, 6, 6, 4, 10, 4, 6, 6, 0, 6, 10, 4, 6, 6, 0, 6, 3, 4, 8, 8, 8, 4, 6, 2, 6, 10, 4, 6, 10, 4, 0, 4, 4, 8, 14, 6, 6, 8, 4, 6, 4, 6, 10, 6, 6, 6, 0, 2, 2, 12, 8, 8 (list; graph; listen)

	OFFSET	`0,2`
	EXAMPLE	`All solutions for n=9` `...0.0.9.0...0.9.0.0...4.0.1.4...4.1.0.4` `...9.0.0.0...0.0.0.9...1.4.4.0...0.4.4.1` `...0.0.0.9...9.0.0.0...0.4.4.1...1.4.4.0` `...0.9.0.0...0.0.9.0...4.1.0.4...4.0.1.4`
	CROSSREFS	`Sequence in context: A130192 A104564 A160764 this_sequence A064656 A056608 A091787` `Adjacent sequences: A156381 A156382 A156383 this_sequence A156385 A156386 A156387`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Feb 09 2009`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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