G.f.: Sum_{n>=0} a(n)*x^n/n!^4 = [ Sum_{n>=0} x^n/n!^4 ]^3.
A172434
G.f.: Sum_{n>=0} a(n)*x^n/n!^4 = [ Sum_{n>=0} x^n/n!^4 ]^3.
Terms
- a(0) =1a(1) =3a(2) =51a(3) =1785a(4) =67635a(5) =2973753a(6) =146591529a(7) =7735733883a(8) =430208938035
External references
- oeis: A172434