Coefficient of x^(4^n) in Q(x)^(n+1) where Q(x) = Sum_{k>=0} (x^(4^k) + x^(2*4^k) + x^(3*4^k)).
A145074
Coefficient of x^(4^n) in Q(x)^(n+1) where Q(x) = Sum_{k>=0} (x^(4^k) + x^(2*4^k) + x^(3*4^k)).
Terms
- a(0) =1a(1) =3a(2) =12a(3) =97a(4) =885a(5) =10386a(6) =141295a(7) =2218987a(8) =39171564a(9) =770029605a(10) =16652860169a(11) =393052609026
External references
- oeis: A145074