G.f. A(x) satisfies: A(x) = 1 + Sum_{k>=1} k*x^k*A(x)^k/(1 - x^k).
A307398
G.f. A(x) satisfies: A(x) = 1 + Sum_{k>=1} k*x^k*A(x)^k/(1 - x^k).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =52a(5) =209a(6) =906a(7) =4010a(8) =18303a(9) =85064a(10) =402008a(11) =1924412a(12) =9314594a(13) =45502924a(14) =224068334a(15) =1111017056a(16) =5542331502a(17) =27796367468a(18) =140072333426a(19) =708875098462
External references
- oeis: A307398