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 A258518 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two sums of the central column and central row nondecreasing horizontally and vertically 1
 512, 7334, 19920, 18282, 4028, 1256, 520, 424, 312, 252, 228, 192, 188, 176, 188, 192, 188, 192, 172, 192, 188, 192, 188, 176, 188, 192, 188, 192, 172, 192, 188, 192, 188, 176, 188, 192, 188, 192, 172, 192, 188, 192, 188, 176, 188, 192, 188, 192, 172, 192, 188, 192 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A258522 LINKS R. H. Hardin, Table of n, a(n) for n = 1..68 EXAMPLE Some solutions for n=4 ..0..1..0..0..0..0....0..1..1..0..0..1....0..1..0..0..0..1....1..1..0..0..0..0 ..0..1..1..0..0..1....0..1..1..1..1..1....1..1..1..1..1..0....1..1..0..1..0..0 ..0..1..1..0..0..1....0..1..1..1..0..0....1..0..1..1..1..0....0..1..1..1..0..0 ..0..0..0..1..1..0....1..1..0..0..0..1....1..1..1..0..0..1....0..1..1..0..1..1 ..1..1..0..0..0..0....1..0..0..0..0..1....1..1..0..0..0..1....0..1..1..0..1..1 ..0..0..1..1..0..1....0..0..1..0..0..1....0..1..1..1..0..0....1..1..1..1..0..0 CROSSREFS Cf. A258522 Sequence in context: A017487 A263034 A254012 * A222775 A257419 A255749 Adjacent sequences:  A258515 A258516 A258517 * A258519 A258520 A258521 KEYWORD nonn AUTHOR R. H. Hardin, Jun 01 2015 STATUS approved

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Last modified May 12 04:27 EDT 2021. Contains 343810 sequences. (Running on oeis4.)