OFFSET
0,2
LINKS
R. H. Hardin, Table of n, a(n) for n=0..63
FORMULA
Empirical g.f.: (1 + 6*x + 22*x^2 + 61*x^3 + 127*x^4 + 196*x^5 + 242*x^6 + 244*x^7 + 193*x^8 + 113*x^9 + 50*x^10 + 16*x^11 + 3*x^12) / ((1 - x)^8*(1 + x)^4*(1 + x + x^2)^4). - Colin Barker, Feb 27 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 09 2009
STATUS
approved