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 A250974 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements 0
 71, 12077, 15156945, 139471732486, 9416933752243198, 4665050923272559405591, 16956293118548007574241097692, 452201064244928394467769407865217365, 88482711640559551663354157554544852988982071 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A250982 LINKS Table of n, a(n) for n=1..9. EXAMPLE Some solutions for n=2 ..1..2..2....0..1..0....2..2..2....2..2..1....2..1..0....1..2..0....2..2..1 ..2..2..1....0..2..1....0..1..0....2..0..2....1..0..2....1..2..2....1..1..1 ..0..2..1....2..0..0....1..0..2....2..2..2....2..2..2....1..1..0....2..1..1 CROSSREFS Sequence in context: A115447 A200960 A260034 * A209952 A251382 A208679 Adjacent sequences: A250971 A250972 A250973 * A250975 A250976 A250977 KEYWORD nonn AUTHOR R. H. Hardin, Nov 29 2014 STATUS approved

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Last modified May 31 14:54 EDT 2023. Contains 363068 sequences. (Running on oeis4.)