Let S(t) = 1 + s_1*t + s_2*t^2 + ... satisfy S' = -S/(2 + S); sequence gives denominators of s_n.

A058956

Let S(t) = 1 + s_1*t + s_2*t^2 + ... satisfy S' = -S/(2 + S); sequence gives denominators of s_n.

Terms

    a(0) =1a(1) =3a(2) =27a(3) =1a(4) =4374a(5) =98415a(6) =885735a(7) =3720087a(8) =55801305a(9) =1291401630a(10) =813583026900

External references