G.f. A(x) satisfies 1/3 = Sum_{n=-oo..+oo} x^n*A(x)^n * (A(x)^n + 2*x)^(n-1) * (x^n + 2*A(x))^(n-1).
A381364
G.f. A(x) satisfies 1/3 = Sum_{n=-oo..+oo} x^n*A(x)^n * (A(x)^n + 2*x)^(n-1) * (x^n + 2*A(x))^(n-1).
Terms
- a(0) =1a(1) =6a(2) =69a(3) =1185a(4) =25971a(5) =638664a(6) =16870146a(7) =469957290a(8) =13643527371a(9) =409333196409
External references
- oeis: A381364