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, Jan 21 2021: (Start)
a(n) = 2*a(n-2) - 3*a(n-4) + 4*a(n-6) - 3*a(n-8) + 2*a(n-10) - a(n-12) for n > 13.
G.f.: (-2*x^13 + 3*x^12 + 6*x^11 + 4*x^10 + 6*x^9 + 11*x^8 + 10*x^7 + 10*x^6 + 8*x^5 + 9*x^4 + 8*x^3 + 6*x^2 + 4*x + 1)/((x - 1)^2*(x + 1)^2*(x^4 + 1)^2). (End)
CROSSREFS
KEYWORD
nonn
AUTHOR
Brian Galebach and N. J. A. Sloane, Jun 18 2018
STATUS
approved