G.f. satisfies: A(x) = x + A(A(x))^2 - A(A(x))^4.
A171992
G.f. satisfies: A(x) = x + A(A(x))^2 - A(A(x))^4.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =23a(4) =166a(5) =1380a(6) =12684a(7) =125857a(8) =1328084a(9) =14754242a(10) =171338020a(11) =2069009164a(12) =25877555908a(13) =334197713580
External references
- oeis: A171992