OFFSET
30,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 30..10000
FORMULA
G.f.: -(x^25 -x^23 -x^21 -x^20 -x^17 +x^16 +x^14 +2*x^13 +x^12 +x^11 +x^10 +x^7 -x^6 -x^5 -x^4 -x^3 -x^2 -1) *x^30 / ((x^2-x+1) *(x^4-x^3+x^2-x+1) *(x^6+x^3+1) *(x^4+1) *(x^6+x^5+x^4+x^3+x^2+x+1) *(x^2+1)^2 *(x^4+x^3+x^2+x+1)^2 *(x^2+x+1)^3 *(x+1)^5 *(x-1)^10).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Alois P. Heinz, Oct 16 2018
STATUS
approved