A311553 Coordination sequence Gal.6.133.1 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, 4, 8, 12, 17, 23, 29, 35, 40, 44, 48, 52, 56, 60, 64, 69, 75, 81, 87, 92, 96, 100, 104, 108, 112, 116, 121, 127, 133, 139, 144, 148, 152, 156, 160, 164, 168, 173, 179, 185, 191, 196, 200, 204, 208, 212, 216, 220, 225, 231

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 24 2020: (Start)

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

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

Crossrefs

Sequence in context: A311550 A311551 A311552 * A311554 A340266 A194274

Adjacent sequences: A311550 A311551 A311552 * A311554 A311555 A311556

Keyword

nonn

Author

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

Status

approved