G.f.: A(x) = exp( Sum_{n>=1} (x^n/n) * (1 + x^n*A(x)^n) / (1 - x^n*A(x)^n)).
A325213
G.f.: A(x) = exp( Sum_{n>=1} (x^n/n) * (1 + x^n*A(x)^n) / (1 - x^n*A(x)^n)).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =22a(5) =68a(6) =230a(7) =790a(8) =2809a(9) =10151a(10) =37346a(11) =139116a(12) =524160a(13) =1993184a(14) =7641077a(15) =29497043a(16) =114568292a(17) =447397474a(18) =1755543081a(19) =6918285937a(20) =27369693199a(21) =108659122477a(22) =432762724820
External references
- oeis: A325213