Coefficient of x^(5^n) in Q(x)^(n+1), where Q(x) = Sum_{k>=0} (x^(5^k) + x^(2*5^k) + x^(3*5^k) + x^(4*5^k)).
A145075
Coefficient of x^(5^n) in Q(x)^(n+1), where Q(x) = Sum_{k>=0} (x^(5^k) + x^(2*5^k) + x^(3*5^k) + x^(4*5^k)).
Terms
- a(0) =1a(1) =4a(2) =18a(3) =172a(4) =1881a(5) =25644a(6) =411488a(7) =7581792a(8) =157296141a(9) =3630709734a(10) =92225760033
External references
- oeis: A145075