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A310651 Coordination sequence Gal.6.548.2 where G.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. 0
1, 4, 6, 14, 20, 26, 28, 30, 40, 38, 48, 54, 60, 60, 62, 74, 70, 82, 88, 94, 92, 94, 108, 102, 116, 122, 128, 124, 126, 142, 134, 150, 156, 162, 156, 158, 176, 166, 184, 190, 196, 188, 190, 210, 198, 218, 224, 230, 220, 222 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

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.

LINKS

Table of n, a(n) for n=0..49.

Brian Galebach, k-uniform tilings (k <= 6) and their A-numbers

FORMULA

Conjectures from Chai Wah Wu, Dec 24 2019: (Start)

a(n) = 2*a(n-7) - a(n-14) for n > 15.

G.f.: (-2*x^15 + 3*x^14 + 4*x^13 + 8*x^12 + 14*x^11 + 20*x^10 + 26*x^9 + 32*x^8 + 28*x^7 + 28*x^6 + 26*x^5 + 20*x^4 + 14*x^3 + 6*x^2 + 4*x + 1)/(x^14 - 2*x^7 + 1). (End)

CROSSREFS

Sequence in context: A310648 A310649 A310650 * A122555 A210632 A097271

Adjacent sequences:  A310648 A310649 A310650 * A310652 A310653 A310654

KEYWORD

nonn

AUTHOR

Brian Galebach and N. J. A. Sloane, Jun 18 2018

STATUS

approved

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Last modified April 17 03:58 EDT 2021. Contains 343059 sequences. (Running on oeis4.)