G.f. A(x) satisfies A(x) = 1/( 1 - 4*x*(1 + x)*A(x) )^(1/2).
A372086
G.f. A(x) satisfies A(x) = 1/( 1 - 4*x*(1 + x)*A(x) )^(1/2).
Terms
- a(0) =1a(1) =2a(2) =12a(3) =84a(4) =664a(5) =5624a(6) =49928a(7) =458480a(8) =4318896a(9) =41503168a(10) =405267840a(11) =4009684608a(12) =40109536992a(13) =404977089792
External references
- oeis: A372086