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A235279
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Number of (n+1)X(9+1) 0..4 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 5 (constant stress 1X1 tilings)
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1
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35200, 41500, 48328, 62800, 79480, 115480, 160888, 260680, 401560, 716200, 1215928, 2348200, 4345240, 8936680, 17733688, 38288680, 80144920, 179655400, 391244728, 902914600, 2024143000, 4777083880, 10935717688, 26248208680
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OFFSET
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1,1
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COMMENTS
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Column 9 of A235280
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..31
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FORMULA
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Empirical: a(n) = a(n-1) +15*a(n-2) -15*a(n-3) -80*a(n-4) +80*a(n-5) +180*a(n-6) -180*a(n-7) -144*a(n-8) +144*a(n-9)
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EXAMPLE
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Some solutions for n=5
..0..4..0..1..0..2..0..3..0..4....1..3..1..3..1..3..1..4..1..3
..4..3..4..0..4..1..4..2..4..3....3..0..3..0..3..0..3..1..3..0
..0..4..0..1..0..2..0..3..0..4....0..2..0..2..0..2..0..3..0..2
..4..3..4..0..4..1..4..2..4..3....3..0..3..0..3..0..3..1..3..0
..0..4..0..1..0..2..0..3..0..4....1..3..1..3..1..3..1..4..1..3
..4..3..4..0..4..1..4..2..4..3....4..1..4..1..4..1..4..2..4..1
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CROSSREFS
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Sequence in context: A085545 A031855 A186567 * A133282 A257724 A254016
Adjacent sequences: A235276 A235277 A235278 * A235280 A235281 A235282
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Jan 05 2014
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STATUS
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approved
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