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A214189
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Number of 0..6 colorings of a 2X(n+1) array circular in the n+1 direction with new values 0..6 introduced in row major order
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1
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4, 18, 353, 7434, 198052, 5731144, 172707247, 5290686318, 163203090770, 5048858758020, 156379568912461, 4846014558069802, 150203703987575008, 4656019290676790496, 144332757507860933195, 4474265565293272517286
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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) = 39*a(n-1) -133*a(n-2) -3905*a(n-3) +6437*a(n-4) +125497*a(n-5) +83961*a(n-6) -931595*a(n-7) -1308936*a(n-8) +809964*a(n-9) +1218672*a(n-10)
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EXAMPLE
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Some solutions for n=4
..0..1..2..3..1....0..1..0..1..2....0..1..2..0..1....0..1..2..0..1
..2..3..0..1..0....2..3..1..0..1....3..4..5..3..6....1..2..0..1..0
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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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