G.f. A(x) satisfies A(x) = 1/( 1 - x*(A(x) + A(2*x))^2 ).
A385648
G.f. A(x) satisfies A(x) = 1/( 1 - x*(A(x) + A(2*x))^2 ).
Terms
- a(0) =1a(1) =4a(2) =64a(3) =1872a(4) =91328a(5) =7563648a(6) =1115422976a(7) =306988895488
External references
- oeis: A385648