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A305283
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Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero.
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1
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1, 23, 55, 279, 895, 3696, 13289, 51734, 192418, 735241, 2765966, 10501378, 39658770, 150239389, 568125614, 2150618007, 8136093736, 30791019947, 116504256865, 440871748994, 1668215077887, 6312621082911, 23886745061996
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OFFSET
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1,2
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COMMENTS
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Column 3 of A305288.
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = a(n-1) +11*a(n-2) +5*a(n-3) -19*a(n-4) -23*a(n-5) -2*a(n-6) -14*a(n-7) -16*a(n-8) -19*a(n-9) -12*a(n-10) -a(n-11) -6*a(n-12) +3*a(n-13) -a(n-14) +2*a(n-15) for n>16
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EXAMPLE
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Some solutions for n=5
..0..0..0. .0..0..1. .0..1..0. .0..0..0. .0..0..0. .0..0..1. .0..1..0
..1..0..1. .1..0..1. .1..1..1. .0..1..1. .0..1..0. .1..1..1. .1..0..1
..0..1..1. .0..1..0. .0..1..1. .1..1..1. .0..0..0. .0..1..0. .0..0..0
..1..0..0. .1..1..1. .1..0..1. .1..1..0. .0..0..0. .0..1..0. .0..0..0
..0..0..1. .0..1..0. .0..0..0. .1..0..0. .1..1..1. .1..1..1. .1..0..1
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CROSSREFS
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Cf. A305288.
Sequence in context: A303891 A264117 A033657 * A166144 A007795 A153353
Adjacent sequences: A305280 A305281 A305282 * A305284 A305285 A305286
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, May 29 2018
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STATUS
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approved
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