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
From Chai Wah Wu, Dec 20 2019: (Start)
a(n) = a(n-4) - a(n-5) + a(n-7) + a(n-9) - a(n-11) + a(n-12) - a(n-16) for n > 22 (conjectured).
G.f.: (-x^22 - x^17 + x^16 + 8*x^15 + 11*x^14 + 16*x^13 + 21*x^12 + 23*x^11 + 30*x^10 + 34*x^9 + 31*x^8 + 34*x^7 + 28*x^6 + 23*x^5 + 21*x^4 + 15*x^3 + 11*x^2 + 6*x + 1)/(x^16 - x^12 + x^11 - x^9 - x^7 + x^5 - x^4 + 1) (conjectured). (End)
CROSSREFS
KEYWORD
nonn
AUTHOR
Brian Galebach and N. J. A. Sloane, Jun 18 2018
STATUS
approved