G.f. satisfies A(x) = exp( Sum_{k>=1} A(x^k) * (4*x)^k/k ).
A363440
G.f. satisfies A(x) = exp( Sum_{k>=1} A(x^k) * (4*x)^k/k ).
Terms
- a(0) =1a(1) =4a(2) =32a(3) =256a(4) =2208a(5) =19712a(6) =183808a(7) =1763328a(8) =17332992a(9) =173621248a(10) =1766188288a(11) =18196260864a(12) =189474570240
External references
- oeis: A363440