A315633 Coordination sequence Gal.6.261.6 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, 6, 12, 16, 20, 24, 30, 34, 38, 42, 48, 54, 60, 66, 70, 74, 78, 84, 88, 92, 96, 102, 108, 114, 120, 124, 128, 132, 138, 142, 146, 150, 156, 162, 168, 174, 178, 182, 186, 192, 196, 200, 204, 210, 216, 222, 228, 232, 236, 240

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, Jan 13 2023: (Start)

a(n) = a(n-1) + a(n-11) - a(n-12) for n > 12.

G.f.: (x^12 + 5*x^11 + 6*x^10 + 4*x^9 + 4*x^8 + 4*x^7 + 6*x^6 + 4*x^5 + 4*x^4 + 4*x^3 + 6*x^2 + 5*x + 1)/(x^12 - x^11 - x + 1). (End)

Crossrefs

Sequence in context: A315631 A118422 A315632 * A315634 A390848 A315635

Adjacent sequences: A315630 A315631 A315632 * A315634 A315635 A315636

Keyword

nonn

Author

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

Status

approved