A313793 Coordination sequence Gal.4.134.1 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, 5, 10, 15, 21, 27, 32, 37, 42, 47, 52, 57, 63, 69, 74, 79, 84, 89, 94, 99, 105, 111, 116, 121, 126, 131, 136, 141, 147, 153, 158, 163, 168, 173, 178, 183, 189, 195, 200, 205, 210, 215, 220, 225, 231, 237, 242, 247, 252, 257

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, Apr 06 2021: (Start)

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

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

Crossrefs

Sequence in context: A313790 A313791 A313792 * A313794 A313795 A313796

Adjacent sequences: A313790 A313791 A313792 * A313794 A313795 A313796

Keyword

nonn

Author

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

Status

approved