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 A258523 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
 512, 16473, 523716, 6505920, 65947572, 592438330, 6279181504, 90536765981, 940469384118, 13154653966188, 268158250039108, 2752663543823279, 39677268013710316, 3474369295264994411, 23501492053909210974 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A258530 LINKS R. H. Hardin, Table of n, a(n) for n = 1..26 EXAMPLE Some solutions for n=2 ..0..1..0..1....0..0..1..0....1..0..0..0....1..0..1..0....0..0..1..0 ..1..1..1..1....1..0..0..0....0..1..1..1....0..1..0..1....0..0..1..1 ..1..0..1..0....1..0..0..1....1..1..0..1....0..1..0..0....1..0..1..0 ..1..0..1..0....0..1..1..1....0..0..1..1....1..1..1..0....1..1..0..1 CROSSREFS Cf. A258530 Sequence in context: A200791 A254812 A329894 * A257147 A254579 A195657 Adjacent sequences:  A258520 A258521 A258522 * A258524 A258525 A258526 KEYWORD nonn AUTHOR R. H. Hardin, Jun 02 2015 STATUS approved

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Last modified July 30 21:33 EDT 2021. Contains 346365 sequences. (Running on oeis4.)