G.f.: Product_{n>=0} 1/(1-a(n)*x^(n+1))^3 = Sum_{n>=0} a(n)*x^n.
A203507
G.f.: Product_{n>=0} 1/(1-a(n)*x^(n+1))^3 = Sum_{n>=0} a(n)*x^n.
Terms
- a(0) =1a(1) =3a(2) =15a(3) =82a(4) =504a(5) =3198a(6) =21592a(7) =147570a(8) =1045221a(9) =7464052a(10) =54549804a(11) =400487997a(12) =2990765270a(13) =22396990002a(14) =169881957174
External references
- oeis: A203507