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
FORMULA
Conjectures from Chai Wah Wu, Apr 19 2024: (Start)
a(n) = a(n-1) - a(n-3) + a(n-4) + a(n-5) - 2*a(n-6) + a(n-7) + a(n-8) - a(n-9) + a(n-11) - a(n-12) for n > 12.
G.f.: (x + 1)^2*(x^10 + 2*x^9 + 5*x^7 + x^6 + 3*x^5 + x^4 + 5*x^3 + 2*x + 1)/((x - 1)^2*(x^6 + x^3 + 1)*(x^4 + x^3 + x^2 + x + 1)). (End)
CROSSREFS
KEYWORD
nonn
AUTHOR
Brian Galebach and N. J. A. Sloane, Jun 18 2018
STATUS
approved