G.f.: A(x) = Sum_{n>=0} x^n * (1 - x*A(x)^(2*n))/(1 - x*A(x)^(2*n+1)).
A307228
G.f.: A(x) = Sum_{n>=0} x^n * (1 - x*A(x)^(2*n))/(1 - x*A(x)^(2*n+1)).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =61a(6) =257a(7) =1153a(8) =5417a(9) =26409a(10) =132812a(11) =686158a(12) =3631067a(13) =19640460a(14) =108424399a(15) =610258791a(16) =3499651848a(17) =20440783169a(18) =121582541298a(19) =736487557803
External references
- oeis: A307228