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 A303725 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2 or 3 king-move adjacent elements, with upper left element zero. 1
 32, 293, 151, 221, 345, 569, 894, 1402, 2341, 3998, 6796, 11609, 19890, 34076, 58545, 100728, 173218, 297967, 512794, 882484, 1518819, 2614340, 4500016, 7745865, 13333492, 22951984, 39509087, 68010918, 117074304, 201532279, 346919778 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A303727. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 2*a(n-1) -a(n-4) -a(n-5) +a(n-6) -a(n-7) -a(n-8) +2*a(n-9) for n>15 EXAMPLE Some solutions for n=5 ..0..0..0..1..1..0. .0..1..1..0..0..1. .0..0..0..0..1..1. .0..0..1..1..1..0 ..0..0..0..1..1..1. .1..1..1..0..0..0. .0..0..0..0..1..1. .0..0..1..1..1..0 ..0..0..0..1..1..1. .1..1..1..0..0..0. .0..0..0..0..1..1. .0..0..1..1..1..0 ..0..0..0..1..1..1. .1..1..1..0..0..0. .1..0..0..0..1..1. .0..0..1..1..1..0 ..0..0..0..1..1..0. .1..1..1..0..0..1. .1..1..0..0..1..1. .0..0..1..1..1..0 CROSSREFS Cf. A303727. Sequence in context: A337418 A283546 A297685 * A305228 A304773 A316516 Adjacent sequences: A303722 A303723 A303724 * A303726 A303727 A303728 KEYWORD nonn AUTHOR R. H. Hardin, Apr 29 2018 STATUS approved

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Last modified May 22 19:06 EDT 2024. Contains 372758 sequences. (Running on oeis4.)