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 A251121 Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements 0
 10, 40, 108, 266, 580, 1214, 2420, 4702, 8926, 16680, 30766, 56180, 101734, 182956, 327080, 581742, 1030000, 1816290, 3191136, 5588050, 9755530, 16983260, 29489098 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A251128 LINKS EXAMPLE Some solutions for n=4 ..0..0..0..0..1....0..0..0..1..1....0..0..0..1..1....1..0..1..0..1 ..0..0..0..0..1....0..0..0..0..0....1..0..0..0..0....1..0..1..0..1 ..0..0..0..0..1....1..1..1..1..1....1..0..0..0..0....1..0..1..0..0 ..0..0..0..0..0....0..0..0..0..0....1..0..0..0..0....1..0..1..0..0 ..1..0..0..0..0....1..1..0..0..0....1..0..0..0..0....1..0..1..0..0 CROSSREFS Sequence in context: A131037 A071233 A063490 * A002419 A199826 A227056 Adjacent sequences:  A251118 A251119 A251120 * A251122 A251123 A251124 KEYWORD nonn AUTHOR R. H. Hardin, Nov 30 2014 STATUS approved

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Last modified February 16 16:00 EST 2020. Contains 331961 sequences. (Running on oeis4.)