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 A195893 Number of lower triangles of a 5X5 integer array with all row and column sums zero and all row and column sums of squares <= 2n^2 1
 83, 1349, 14831, 68551, 241221, 680115, 1686561, 3665777, 7197327, 13441577, 23509903, 38130019, 62475265, 96810419, 144798413, 211419333, 301429771, 421198113, 580071707, 789348015, 1055270897, 1390678351, 1808027465 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 5 of A195892 LINKS R. H. Hardin, Table of n, a(n) for n = 1..55 EXAMPLE Some solutions for n=4 ..0..........0..........0..........0..........0..........0..........0 ..3-3.......-3.3.......-3.3.......-2.2.......-1.1.......-4.4........1-1 .-2.4-2......0-2.2......4-3-1......3-3.0......3.1-4.....-1-1.2.....-4.3.1 .-2-2.0.4....3.1.0-4...-1.0.4-3....2.2.0-4...-1.0.2-1....3-1-4.2....2.2-1-3 ..1.1.2-4.0..0-2-2.4.0..0.0-3.3.0.-3-1.0.4.0.-1-2.2.1.0..2-2.2-2.0..1-4.0.3.0 CROSSREFS Sequence in context: A068851 A250083 A292284 * A233332 A175662 A103233 Adjacent sequences:  A195890 A195891 A195892 * A195894 A195895 A195896 KEYWORD nonn AUTHOR R. H. Hardin Sep 24 2011 STATUS approved

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Last modified January 19 00:40 EST 2020. Contains 331030 sequences. (Running on oeis4.)