G.f. A(x) satisfies: A(x) = x + x^2 * exp(4 * Sum_{k>=1} A(x^k) / k).
A345242
G.f. A(x) satisfies: A(x) = x + x^2 * exp(4 * Sum_{k>=1} A(x^k) / k).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =14a(4) =52a(5) =205a(6) =832a(7) =3492a(8) =14960a(9) =65322a(10) =289384a(11) =1298064a(12) =5882712a(13) =26897352a(14) =123919576a(15) =574718308a(16) =2681028168a(17) =12571650355a(18) =59222213028a(19) =280139215118
External references
- oeis: A345242