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 A257353 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum 1
 220, 2116, 17056, 101124, 482560, 2433600, 12278736, 62948356, 314007680, 1594085476, 8000673008, 40717589796, 204018474192, 1037122265664, 5200337912080, 26444894851600, 132569860224000, 674054417903364 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A257361 LINKS R. H. Hardin, Table of n, a(n) for n = 1..25 EXAMPLE Some solutions for n=4 ..0..0..0..0..0..0....0..1..0..0..0..1....0..0..0..0..0..0....0..1..0..0..1..1 ..1..0..0..1..0..1....1..1..1..0..0..1....1..0..1..0..0..1....1..0..0..1..1..1 ..1..1..0..0..1..1....1..1..0..1..1..0....1..1..0..0..1..1....0..0..1..1..1..1 ..0..1..1..0..0..1....0..0..1..1..1..0....1..0..0..1..1..0....1..1..1..1..0..0 ..1..0..1..1..0..0....0..0..1..1..0..1....1..0..1..1..0..0....1..1..1..0..0..1 ..1..0..0..1..1..1....0..1..0..0..1..0....1..0..1..0..0..0....1..1..0..0..1..0 CROSSREFS Cf. A257361 Sequence in context: A180219 A233626 A251322 * A211820 A215491 A258537 Adjacent sequences:  A257350 A257351 A257352 * A257354 A257355 A257356 KEYWORD nonn AUTHOR R. H. Hardin, Apr 20 2015 STATUS approved

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Last modified January 21 16:03 EST 2022. Contains 350479 sequences. (Running on oeis4.)