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 A195894 Number of lower triangles of a 6X6 integer array with all row and column sums zero and all row and column sums of squares <= 2n^2 0
 591, 90013, 4857647, 65530899, 584257875, 3204150229, 15120998539, 54574236425, 172034293523, 489664849531 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 6 of A195892 LINKS Table of n, a(n) for n=1..10. EXAMPLE Some solutions for n=4 ..0............0............0............0............0............0 .-4.4..........2-2..........4-4..........2-2..........2-2..........4-4 .-1-1.2.......-1-1.2.......-4.1.3........3.1-4.......-1.0.1.......-2-2.4 ..1-3.3-1.....-1.1.1-1......0.1.2-3.....-3-2.4.1......3-2.0-1......1.2-3.0 ..1-1-2.0.2....0.3-4-1.2....0.3-2.2-3...-2.1.0-2.3...-3.3.1-2.1...-2.2.0.1-1 ..3.1-3.1-2.0..0-1.1.2-2.0..0-1-3.1.3.0..0.2.0.1-3.0.-1.1-2.3-1.0.-1.2-1-1.1.0 CROSSREFS Sequence in context: A320713 A116170 A171724 * A263555 A156835 A129191 Adjacent sequences: A195891 A195892 A195893 * A195895 A195896 A195897 KEYWORD nonn AUTHOR R. H. Hardin Sep 24 2011 STATUS approved

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Last modified March 2 14:48 EST 2024. Contains 370493 sequences. (Running on oeis4.)