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 A303688 Number of nX6 0..1 arrays with every element unequal to 2, 3 or 4 king-move adjacent elements, with upper left element zero. 1
 0, 209, 108, 1744, 2809, 19068, 55382, 273621, 934066, 4202604, 15472710, 66178236, 253206464, 1054639996, 4118641264, 16900720621, 66776102270, 271648054383, 1080722426035, 4373896909559, 17472759594897, 70501053021557 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 6 of A303690. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=5 ..0..1..0..1..1..0. .0..0..1..0..0..1. .0..1..1..0..0..1. .0..1..1..0..1..0 ..0..1..1..0..0..1. .1..1..1..0..0..1. .0..1..1..0..0..1. .0..1..1..0..0..1 ..0..1..1..0..0..1. .0..1..1..0..0..1. .0..1..1..0..0..1. .1..1..1..0..0..1 ..1..1..1..0..0..1. .0..1..1..0..0..1. .0..1..1..0..0..1. .0..1..1..0..0..1 ..0..0..0..1..0..1. .1..0..0..1..1..0. .1..0..0..1..1..0. .0..1..1..0..1..0 CROSSREFS Cf. A303690. Sequence in context: A268091 A209300 A003740 * A080532 A153442 A159274 Adjacent sequences:  A303685 A303686 A303687 * A303689 A303690 A303691 KEYWORD nonn AUTHOR R. H. Hardin, Apr 28 2018 STATUS approved

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Last modified December 8 18:37 EST 2019. Contains 329865 sequences. (Running on oeis4.)