G.f.: A(x) = Sum_{n>=0} x^n * (1 + (-1)^n * A(x))^n / (1 - (-1)^n * x*A(x))^(n+1).
A325157
G.f.: A(x) = Sum_{n>=0} x^n * (1 + (-1)^n * A(x))^n / (1 - (-1)^n * x*A(x))^(n+1).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =21a(4) =109a(5) =573a(6) =3209a(7) =18409a(8) =108569a(9) =651897a(10) =3977677a(11) =24578237a(12) =153522117a(13) =967698037a(14) =6147885585a(15) =39325620689a(16) =253063546417
External references
- oeis: A325157