G.f.: Product_{n>=0} (1+a(n)*x^(n+1))^3 = Sum_{n>=0} a(n)*x^n.
A203508
G.f.: Product_{n>=0} (1+a(n)*x^(n+1))^3 = Sum_{n>=0} a(n)*x^n.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =64a(4) =354a(5) =2160a(6) =13518a(7) =88374a(8) =584409a(9) =3980736a(10) =27291825a(11) =190771995a(12) =1339606882a(13) =9539905173a(14) =68140709607a(15) =492072701284
External references
- oeis: A203508