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A305683
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Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
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1
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1, 272, 4869, 207116, 8417922, 351440611, 14724197226, 618597002816, 26011056462909, 1094170226062256, 46034445802982048, 1936912759209935324, 81498459201261039711, 3429207685634735798470, 144291337042712251135250
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OFFSET
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1,2
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COMMENTS
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Column 6 of A305685.
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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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EXAMPLE
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Some solutions for n=5
..0..0..1..0..1..0. .0..0..1..0..1..0. .0..0..1..0..0..1. .0..0..1..0..1..1
..0..0..1..1..0..1. .0..0..1..1..1..1. .0..0..1..1..1..0. .0..0..1..1..0..0
..0..0..0..1..1..0. .0..0..1..1..0..1. .0..0..1..1..1..1. .0..0..1..1..0..0
..1..1..0..0..0..1. .1..1..1..0..0..0. .0..0..0..1..0..0. .1..1..0..0..1..1
..0..1..0..1..1..0. .0..1..0..0..1..1. .1..1..0..0..1..1. .0..1..0..1..1..0
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CROSSREFS
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Cf. A305685.
Sequence in context: A302899 A266106 A264077 * A317063 A316930 A317701
Adjacent sequences: A305680 A305681 A305682 * A305684 A305685 A305686
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Jun 08 2018
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STATUS
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approved
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