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 A254546 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally 0
 512, 9292, 129677, 1193965, 8246808, 64180262, 479026957, 2511052025, 21188684994, 181128766926, 982298722361, 8581995931854, 74325711093901, 405810151566882, 3553109063296745 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A254553 LINKS EXAMPLE Some solutions for n=3 ..0..1..1..1..0....0..1..0..0..0....0..0..0..0..1....0..0..1..1..0 ..1..0..1..0..0....0..0..0..0..1....0..0..0..0..0....1..1..0..0..0 ..1..1..1..0..1....1..1..0..0..1....0..0..0..1..1....0..0..0..1..0 ..1..1..0..1..1....1..0..0..1..1....1..1..1..1..0....1..1..0..0..0 ..0..0..0..1..1....1..1..0..1..1....0..0..0..0..0....1..0..0..1..1 CROSSREFS Sequence in context: A254887 A256896 A254234 * A255028 A247932 A090007 Adjacent sequences: A254543 A254544 A254545 * A254547 A254548 A254549 KEYWORD nonn AUTHOR R. H. Hardin, Feb 01 2015 STATUS approved

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Last modified March 22 15:18 EDT 2023. Contains 361432 sequences. (Running on oeis4.)