OFFSET
1,2
FORMULA
a(n) = (n+4)*(n+3)*(n+2)*(n+1)*(n)*(n-1)*(35*n^3+189*n^2+325*n+204)/45360
The denominator of a(n) (45360) equals the product of the first three terms of A036283 (6*60*126). - Johannes W. Meijer, Oct 22 2009
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Johannes W. Meijer & Nico Baken (n.h.g.baken(AT)tudelft.nl), Jun 18 2009
STATUS
approved