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 A211913 Number of lower triangular nXn arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-4 0
 0, 0, 10, 802, 27963, 394117, 3243531, 18826250, 85484512, 323341343, 1061434357, 3110902786, 8308425940 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Column 3 of A211916 LINKS EXAMPLE Some solutions for n=4 ..0........0........0........0........0........0........0........0 ..1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2 ..0.3.4....3.4.5....3.0.4....3.4.0....3.4.5....0.3.4....0.3.4....3.4.5 ..5.6.0.5..0.1.6.7..4.5.6.0..5.6.7.6..2.1.6.3..5.2.6.7..4.5.6.1..1.6.2.1 CROSSREFS Sequence in context: A221045 A015057 A233170 * A006440 A054944 A015093 Adjacent sequences:  A211910 A211911 A211912 * A211914 A211915 A211916 KEYWORD nonn AUTHOR R. H. Hardin Apr 25 2012 STATUS approved

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