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A310027
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Coordination sequence Gal.5.41.2 where Gal.u.t.v denotes the coordination sequence for a vertex of type v in tiling number t in the Galebach list of u-uniform tilings.
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0
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1, 3, 5, 8, 11, 14, 18, 21, 23, 25, 28, 32, 34, 35, 39, 44, 47, 48, 50, 55, 58, 58, 61, 66, 69, 71, 74, 78, 80, 81, 85, 89, 90, 92, 97, 102, 103, 103, 108, 113, 113, 114, 119, 124, 126, 127, 131, 135, 136, 138
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OFFSET
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0,2
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COMMENTS
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Note that there may be other vertices in the Galebach list of u-uniform tilings with u <= 6 that have this same coordination sequence. See the Galebach link for the complete list of A-numbers for all these tilings.
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LINKS
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FORMULA
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a(n) = a(n-1) - a(n-2) + a(n-3) + a(n-19) - a(n-20) + a(n-21) - a(n-22) for n > 22.
G.f.: (x + 1)^2*(x^2 - x + 1)^2*(x^2 + x + 1)*(x^14 + x^13 + x^12 + x^11 - x^10 + x^8 + x^7 + x^6 - x^4 + x^3 + x^2 + x + 1)/(x^22 - x^21 + x^20 - x^19 - x^3 + x^2 - x + 1). (End)
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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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