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A301539
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Number of nX6 0..1 arrays with every element equal to 0, 1 or 3 horizontally or vertically adjacent elements, with upper left element zero.
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1
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13, 42, 154, 603, 2417, 10783, 47791, 215362, 990403, 4616134, 21616069, 101719485, 480319135, 2272163307, 10763099175, 51036985495, 242162709431, 1149466726275, 5457682636775, 25918135231397, 123098181426713, 584702778533156
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OFFSET
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1,1
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COMMENTS
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Column 6 of A301541.
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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..0..1..0..1. .0..0..0..1..0..1. .0..1..0..1..0..1. .0..0..1..0..0..1
..1..0..1..0..1..0. .1..0..1..0..1..1. .1..0..0..0..1..0. .1..1..1..1..1..0
..1..1..0..1..0..1. .0..1..0..1..0..1. .0..1..1..1..0..1. .0..1..0..1..0..1
..1..0..1..0..1..1. .0..0..1..1..0..0. .1..0..1..0..1..0. .1..0..1..0..1..0
..0..1..1..1..0..1. .0..1..0..1..0..1. .0..0..0..1..1..1. .0..1..0..0..0..1
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CROSSREFS
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Cf. A301541.
Sequence in context: A233298 A243028 A242544 * A240517 A074022 A232448
Adjacent sequences: A301536 A301537 A301538 * A301540 A301541 A301542
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Mar 23 2018
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STATUS
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approved
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