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, Dec 10 2018: (Start)
a(n) = 2*a(n-7) - a(n-14) for n > 14.
G.f.: (x^14 + 3*x^13 + 7*x^12 + 12*x^11 + 17*x^10 + 20*x^9 + 23*x^8 + 24*x^7 + 23*x^6 + 21*x^5 + 18*x^4 + 11*x^3 + 6*x^2 + 3*x + 1)/(x^14 - 2*x^7 + 1). (End)
CROSSREFS
KEYWORD
nonn
AUTHOR
Brian Galebach and N. J. A. Sloane, Jun 18 2018
STATUS
approved