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, Jun 09 2022: (Start)
a(n) = a(n-6) + a(n-10) - a(n-16) for n > 21.
G.f.: (-2*x^21 - 2*x^20 + 2*x^18 + x^16 + 6*x^15 + 14*x^14 + 18*x^13 + 18*x^12 + 28*x^11 + 35*x^10 + 32*x^9 + 32*x^8 + 28*x^7 + 33*x^6 + 28*x^5 + 18*x^4 + 16*x^3 + 12*x^2 + 6*x + 1)/(x^16 - x^10 - x^6 + 1). (End)
CROSSREFS
KEYWORD
nonn
AUTHOR
Brian Galebach and N. J. A. Sloane, Jun 18 2018
STATUS
approved