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A259510
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Number of (n+1)X(3+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0101 0111
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1
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87, 533, 3270, 20293, 126045, 784130, 4879059, 30366347, 189000090, 1176388523, 7322185101, 45575811794, 283679519673, 1765722127481, 10990478900276, 68408656100315, 425799800891931, 2650329642920874, 16496595246904901
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OFFSET
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1,1
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COMMENTS
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Column 3 of A259515
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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) = 5*a(n-1) +20*a(n-2) -68*a(n-3) -97*a(n-4) +234*a(n-5) +159*a(n-6) -238*a(n-7) -94*a(n-8) +56*a(n-9) +8*a(n-10)
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EXAMPLE
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Some solutions for n=4
..1..0..0..0....0..0..1..0....0..0..0..0....0..0..0..1....0..1..0..0
..0..0..0..0....0..1..0..0....0..1..0..0....1..0..1..1....1..0..0..1
..0..0..0..0....0..0..0..1....1..1..1..0....0..1..1..0....0..1..0..0
..0..0..0..1....0..0..0..0....1..0..1..1....1..0..1..1....0..0..0..1
..0..0..1..1....0..0..0..1....1..1..0..1....0..0..0..1....0..0..1..0
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CROSSREFS
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Cf. A259515
Sequence in context: A098139 A359341 A297509 * A109601 A297723 A061625
Adjacent sequences: A259507 A259508 A259509 * A259511 A259512 A259513
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Jun 29 2015
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STATUS
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approved
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