G.f. satisfies A(x) = 1 + x * A(x)^2 * (1 - A(x) + A(x)^2 - A(x)^3 + A(x)^4).
A370473
G.f. satisfies A(x) = 1 + x * A(x)^2 * (1 - A(x) + A(x)^2 - A(x)^3 + A(x)^4).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =25a(4) =185a(5) =1501a(6) =12914a(7) =115723a(8) =1068505a(9) =10094770a(10) =97117624a(11) =948181724a(12) =9370734322a(13) =93562986440a(14) =942385174150
External references
- oeis: A370473