G.f.: exp( Sum_{n>=1} (3*n)!/n!^3 * x^n/n ).
A229451
G.f.: exp( Sum_{n>=1} (3*n)!/n!^3 * x^n/n ).
Terms
- a(0) =1a(1) =6a(2) =63a(3) =866a(4) =13899a(5) =246366a(6) =4676768a(7) =93322596a(8) =1934035965a(9) =41286407510a(10) =902562584556
External references
- oeis: A229451