G.f. satisfies: x = Sum_{n>=1} 1/A(x)^(4*n) * Product_{k=1..n} (1 - 1/A(x)^k).
A181998
G.f. satisfies: x = Sum_{n>=1} 1/A(x)^(4*n) * Product_{k=1..n} (1 - 1/A(x)^k).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =18a(4) =124a(5) =935a(6) =7443a(7) =61510a(8) =522467a(9) =4532452a(10) =39985628a(11) =357641094a(12) =3235846003a(13) =29565353095a(14) =272429349163
External references
- oeis: A181998