G.f. satisfies: A(x) = Series_Reversion( x/(1 + A(x) + A(x)^2) ).
A140097
G.f. satisfies: A(x) = Series_Reversion( x/(1 + A(x) + A(x)^2) ).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =12a(4) =60a(5) =346a(6) =2218a(7) =15444a(8) =115075a(9) =908155a(10) =7535185a(11) =65374018a(12) =590579575a(13) =5537249212a(14) =53742567000a(15) =538801229874
External references
- oeis: A140097