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 A228753 Number of nX7 binary arrays with top left element equal to 1 and no two ones adjacent horizontally or antidiagonally. 1
 13, 289, 6277, 134440, 2876170, 61534448, 1316714732, 28177227352, 602998827928, 12904414518912, 276160275058160, 5909958226524512, 126475877308730464, 2706643227463513344, 57923438257867988416, 1239588830689830585216 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A228754 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 34*a(n-1) -324*a(n-2) +1264*a(n-3) -2236*a(n-4) +1816*a(n-5) -624*a(n-6) +64*a(n-7) for n>9 EXAMPLE Some solutions for n=4 ..1..0..1..0..0..0..0....1..0..0..1..0..0..1....1..0..1..0..0..0..0 ..0..0..1..0..0..0..1....0..0..0..1..0..0..1....1..0..1..0..0..0..1 ..0..0..0..1..0..0..1....0..0..0..0..1..0..1....0..0..0..1..0..0..1 ..0..0..0..0..1..0..1....1..0..0..0..0..0..0....1..0..0..1..0..0..0 CROSSREFS Sequence in context: A278628 A035017 A064750 * A249864 A246462 A023357 Adjacent sequences: A228750 A228751 A228752 * A228754 A228755 A228756 KEYWORD nonn AUTHOR R. H. Hardin Sep 02 2013 STATUS approved

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Last modified July 23 19:18 EDT 2024. Contains 374553 sequences. (Running on oeis4.)