Coefficient of x^(3^n) in Q(x)^(n+1), where Q(x) = Sum_{k>=0} (x^(3^k) + x^(2*3^k)).
A145073
Coefficient of x^(3^n) in Q(x)^(n+1), where Q(x) = Sum_{k>=0} (x^(3^k) + x^(2*3^k)).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =44a(4) =325a(5) =3110a(6) =34258a(7) =436304a(8) =6246439a(9) =99637730a(10) =1747851787a(11) =33469239848a(12) =694321125511
External references
- oeis: A145073