G.f. A(x) satisfies A(x) = (1 + x*A(x)^4) * C(x*A(x)^2), where C(x) is the g.f. of A000108.
A381784
G.f. A(x) satisfies A(x) = (1 + x*A(x)^4) * C(x*A(x)^2), where C(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =2a(2) =15a(3) =153a(4) =1799a(5) =22969a(6) =309479a(7) =4331175a(8) =62349575a(9) =917335467a(10) =13732751589a(11) =208509835114
External references
- oeis: A381784