G.f. A(x) satisfies A(x) = 1/( 1 - x * (1 + 4*x)^(1/2) * A(x)^2 ).
A372139
G.f. A(x) satisfies A(x) = 1/( 1 - x * (1 + 4*x)^(1/2) * A(x)^2 ).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =22a(4) =131a(5) =775a(6) =5018a(7) =33066a(8) =225915a(9) =1569663a(10) =11114665a(11) =79715150a(12) =578603008a(13) =4239698240a(14) =31329174328a(15) =233166912152
External references
- oeis: A372139