G.f. A(x) satisfies A(x) = 1 + x*(A(x)^2 - A(x)^3 + A(x)^4).
A219537
G.f. A(x) satisfies A(x) = 1 + x*(A(x)^2 - A(x)^3 + A(x)^4).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =66a(5) =366a(6) =2148a(7) =13115a(8) =82449a(9) =530095a(10) =3469401a(11) =23037642a(12) =154820262a(13) =1050999343a(14) =7196493255a(15) =49644745965a(16) =344704716018
External references
- oeis: A219537