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 A257202 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 minimums of the central column and central row nondecreasing horizontally and vertically 1
 512, 7800, 49932, 387056, 654637, 516615, 848628, 1271947, 1749293, 2675122, 3991360, 5698952, 8019568, 11234476, 15595519, 21319231, 28669112, 38015446, 50100115, 65102076, 83309215, 106038988, 134027052, 167393397, 207962738 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A257209 LINKS R. H. Hardin, Table of n, a(n) for n = 1..31 EXAMPLE Some solutions for n=3 ..0..1..0..1..1....0..0..0..1..0....0..0..0..0..1....0..1..1..1..0 ..0..0..0..1..1....0..0..0..1..1....0..0..1..0..0....1..0..0..1..1 ..0..0..1..1..1....0..0..0..0..1....1..0..1..0..0....1..0..1..1..1 ..1..0..1..0..1....0..0..1..1..1....0..0..1..1..0....1..1..1..0..1 ..0..0..1..1..1....1..0..0..0..1....0..1..0..1..1....0..1..1..1..1 CROSSREFS Cf. A257209 Sequence in context: A257419 A255749 A251186 * A070057 A017619 A253928 Adjacent sequences:  A257199 A257200 A257201 * A257203 A257204 A257205 KEYWORD nonn AUTHOR R. H. Hardin, Apr 18 2015 STATUS approved

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Last modified July 23 13:58 EDT 2019. Contains 325254 sequences. (Running on oeis4.)