G.f.: A(x) = 1 + x*[A_2(x)]^2, where A_2(x) = 2 + x*[A_3(x)]^2, A_3(x) = 3 + x*[A_4(x)]^2, ..., A_n(x) = n + x*[A_{n+1}(x)]^2, ...
A135906
G.f.: A(x) = 1 + x*[A_2(x)]^2, where A_2(x) = 2 + x*[A_3(x)]^2, A_3(x) = 3 + x*[A_4(x)]^2, ..., A_n(x) = n + x*[A_{n+1}(x)]^2, ...
Terms
- a(0) =1a(1) =4a(2) =36a(3) =465a(4) =7552a(5) =145144a(6) =3191724a(7) =78633536a(8) =2139797572a(9) =63661720934
External references
- oeis: A135906