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 A156380 Number of 3X3 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n. 0
 1, 4, 4, 1, 4, 6, 4, 0, 4, 8, 6, 4, 1, 6, 6, 0, 4, 10, 8, 4, 6, 6, 4, 0, 4, 16, 12, 5, 0, 12, 6, 0, 4, 8, 16, 6, 8, 6, 10, 0, 6, 22, 6, 4, 4, 12, 6, 0, 1, 10, 22, 11, 6, 12, 14, 0, 6, 8, 6, 10, 0, 12, 12, 0, 4, 18, 20, 4, 10, 12, 6, 0, 8, 10, 18, 13, 4, 12, 6, 0, 6, 24, 10, 10, 6, 12, 16, 0, 4, 28, 18, 6 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS EXAMPLE All solutions for n=9 ...0.0.9...0.9.0...1.4.4...1.4.4...4.1.4...4.4.1...9.0.0...9.0.0 ...0.9.0...9.0.0...4.1.4...4.4.1...1.4.4...4.1.4...0.0.9...0.9.0 ...9.0.0...0.0.9...4.4.1...4.1.4...4.4.1...1.4.4...0.9.0...0.0.9 CROSSREFS Sequence in context: A327855 A213056 A135012 * A263493 A166237 A021878 Adjacent sequences:  A156377 A156378 A156379 * A156381 A156382 A156383 KEYWORD nonn AUTHOR R. H. Hardin Feb 09 2009 STATUS approved

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Last modified December 16 01:43 EST 2019. Contains 330013 sequences. (Running on oeis4.)