OFFSET
0,20
LINKS
Andreas Blass, Bruce E. Sagan, Characteristic and Ehrhart polynomials, arXiv:math/9801008 [math.CO], 1998.
Andreas Blass, Bruce E. Sagan, Characteristic and Ehrhart polynomials, J. Algebraic Combin. 7 (1998), no. 2, 115--126. MR1609889 (99c:05204)
FORMULA
G.f.: x^18*f(1)^2*f(2)^3*f(3)^2*f(4) where f(k)=1/(1-x^k).
G.f.: x^18/((1-x)^2*(1-x^2)^3*(1-x^3)^2*(1-x^4)). - Colin Barker, Jul 22 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Mar 25 2012
STATUS
approved