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A214110
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Number of 0..3 colorings on an nX7 array circular in the 7 direction with new values 0..3 introduced in row major order
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1
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91, 34041, 12777541, 4797577911, 1801391900581, 676387200779521, 253970131976197721, 95360806682222518731, 35806113871482016834611, 13444493973598029022988181, 5048143980581518949006312711
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 416*a(n-1) -15454*a(n-2) +89758*a(n-3) +90848*a(n-4) -438718*a(n-5) +62801*a(n-6)
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EXAMPLE
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Some solutions for n=4
..0..1..2..3..0..1..3....0..1..0..1..0..1..2....0..1..2..1..0..3..1
..3..0..1..0..1..3..0....1..3..2..3..1..2..3....3..0..3..2..1..0..2
..2..1..2..3..0..1..3....2..0..1..0..2..3..1....0..1..0..1..0..2..1
..1..2..0..1..2..3..0....0..3..0..3..0..1..3....1..0..2..0..1..3..2
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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