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 A253502 Number of (n+2)X(n+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically 1
 132, 472, 1332, 3400, 7948, 17888, 38564, 82200, 171236, 356736, 732740, 1511840, 3087196, 6341584, 12914820, 26464792, 53815684, 110096960, 223649540, 456951728, 927483412, 1892890832, 3839327172, 7827922160, 15867349668 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A253510 LINKS R. H. Hardin, Table of n, a(n) for n = 1..68 EXAMPLE Some solutions for n=4 ..0..1..1..1..1..0....1..1..1..1..1..1....0..1..1..0..0..0....1..1..1..1..1..1 ..1..1..1..1..0..0....1..1..1..1..0..1....1..1..1..1..1..1....1..1..1..1..1..1 ..1..1..1..1..0..1....1..1..0..1..0..1....1..0..0..0..0..0....1..1..1..1..1..0 ..1..1..1..1..0..1....0..1..0..1..0..1....1..1..1..1..1..1....1..1..1..1..0..0 ..1..1..1..1..0..1....0..1..0..1..0..1....0..0..0..0..0..0....1..1..1..1..1..1 ..1..0..0..1..0..1....0..1..0..1..0..1....1..1..1..1..1..1....1..0..0..0..0..0 CROSSREFS Sequence in context: A064059 A244103 A248555 * A257105 A204834 A241288 Adjacent sequences:  A253499 A253500 A253501 * A253503 A253504 A253505 KEYWORD nonn AUTHOR R. H. Hardin, Jan 02 2015 STATUS approved

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Last modified October 22 22:34 EDT 2019. Contains 328335 sequences. (Running on oeis4.)