G.f. is the polynomial (Product_{k=1..26} (1 - x^(3*k)))/(1-x)^26.
A162718
G.f. is the polynomial (Product_{k=1..26} (1 - x^(3*k)))/(1-x)^26.
Terms
- a(0) =1a(1) =26a(2) =351a(3) =3275a(4) =23725a(5) =142155a(6) =733004a(7) =3342079a(8) =13741299a(9) =51711699a(10) =180189789a(11) =586778634a(12) =1799295459a(13) =5228005044a(14) =14469814944a(15) =38320410805a(16) =97478917040a(17) =238976617815a(18) =566281223430
External references
- oeis: A162718