G.f. A(x) satisfies: A(x) = Series_Reversion( x - (A(x)^2 + A(-x)^2)/2 ).
A227852
G.f. A(x) satisfies: A(x) = Series_Reversion( x - (A(x)^2 + A(-x)^2)/2 ).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =10a(4) =44a(5) =294a(6) =1728a(7) =13389a(8) =93130a(9) =796620a(10) =6235288a(11) =57551130a(12) =493813936a(13) =4857378920a(14) =44989814920a(15) =468103507718
External references
- oeis: A227852