G.f. A(x) satisfies A(x) = 1/( 1 - 4*x*A(x)*(1 + x*A(x)) )^(1/2).
A372090
G.f. A(x) satisfies A(x) = 1/( 1 - 4*x*A(x)*(1 + x*A(x)) )^(1/2).
Terms
- a(0) =1a(1) =2a(2) =12a(3) =88a(4) =728a(5) =6464a(6) =60192a(7) =579968a(8) =5733728a(9) =57834496a(10) =592831616a(11) =6157627392a(12) =64667721472a(13) =685526908928
External references
- oeis: A372090