A310096 Coordination sequence Gal.4.15.1 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.

1, 3, 6, 11, 15, 17, 20, 23, 26, 33, 37, 37, 40, 43, 46, 55, 59, 57, 60, 63, 66, 77, 81, 77, 80, 83, 86, 99, 103, 97, 100, 103, 106, 121, 125, 117, 120, 123, 126, 143, 147, 137, 140, 143, 146, 165, 169, 157, 160, 163

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) = a(n-1) - a(n-2) + a(n-3) - a(n-4) + a(n-5) + a(n-6) - a(n-7) + a(n-8) - a(n-9) + a(n-10) - a(n-11) for n > 11.

G.f.: (x^2 + 1)*(x^9 + 2*x^8 + 4*x^7 + 4*x^6 + 4*x^5 + 5*x^4 + 5*x^3 + 3*x^2 + 2*x + 1)/((x - 1)^2*(x + 1)*(x^2 - x + 1)^2*(x^2 + x + 1)^2). (End)

Crossrefs

Sequence in context: A049620 A350438 A329741 * A310097 A310098 A310099

Adjacent sequences: A310093 A310094 A310095 * A310097 A310098 A310099

Keyword

nonn

Author

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

Status

approved