G.f. is the polynomial (Product_{k=1..30} (1 - x^(3*k)))/(1-x)^30.
A162736
G.f. is the polynomial (Product_{k=1..30} (1 - x^(3*k)))/(1-x)^30.
Terms
- a(0) =1a(1) =30a(2) =465a(3) =4959a(4) =40890a(5) =277791a(6) =1618199a(7) =8306730a(8) =38329299a(9) =161383520a(10) =627356796a(11) =2272915164a(12) =7734020120a(13) =24874638204a(14) =76028550900a(15) =221849950497a(16) =620471946324
External references
- oeis: A162736