OFFSET
0,1
FORMULA
G.f.: (2 + 8*x + 22*x^2 + 47*x^3 + 85*x^4 + 138*x^5 + 204*x^6 + 274*x^7 + 341*x^8 + 403*x^9 + 441*x^10 + 472*x^11+ 480*x^12 + 485*x^13 + 479*x^14 + 477*x^15 + 467*x^16 + 454*x^17 + 432*x^18+ 394*x^19 + 343*x^20 + 280*x^21 + 209*x^22 + 143*x^23 + 80*x^24 + 41*x^25 + 11*x^26+ 2*x^27 - 2*x^28 + 3*x^29 + 4*x^30 + 9*x^31 + 6*x^32 + 5*x^33 + 2*x^34 - x^37) / ((1-x) * (1-x^2) * (1-x^3)^2 * (1-x^4)^2 * (1-x^5) * (1-x^6)^2 * (1-x^15)).
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved