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 A304052 Number of nX2 0..1 arrays with every element unequal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero. 8
 1, 3, 11, 10, 51, 165, 306, 993, 2867, 6818, 19499, 54021, 139706, 384617, 1048819, 2792250, 7592483, 20586021, 55352322, 149900145, 405599347, 1094294546, 2959508123, 8001948805, 21614029834, 58429173497, 157940108211, 426779942186 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 2 of A304058. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-1) +3*a(n-2) +8*a(n-3) -4*a(n-4) -16*a(n-5) for n>6 EXAMPLE Some solutions for n=5 ..0..0. .0..0. .0..0. .0..1. .0..0. .0..0. .0..0. .0..1. .0..0. .0..0 ..0..1. .0..1. .1..1. .0..1. .0..1. .1..0. .1..0. .0..1. .1..0. .1..0 ..0..0. .0..0. .1..1. .0..0. .0..0. .0..0. .0..0. .1..1. .0..0. .0..0 ..1..0. .0..1. .1..0. .1..0. .1..0. .1..0. .0..1. .0..1. .1..0. .0..0 ..1..0. .0..1. .1..0. .0..0. .0..1. .1..0. .0..0. .0..1. .0..1. .1..1 CROSSREFS Cf. A304058. Sequence in context: A084409 A038229 A257538 * A303122 A080351 A178709 Adjacent sequences:  A304049 A304050 A304051 * A304053 A304054 A304055 KEYWORD nonn AUTHOR R. H. Hardin, May 05 2018 STATUS approved

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Last modified November 24 20:34 EST 2020. Contains 338616 sequences. (Running on oeis4.)