G.f. satisfies A(x) = F(x*A(x)), where F(x) is the g.f. of A094557.

A094558

G.f. satisfies A(x) = F(x*A(x)), where F(x) is the g.f. of A094557.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =10a(4) =42a(5) =180a(6) =825a(7) =3874a(8) =18761a(9) =92524a(10) =464208a(11) =2359120a(12) =12125196a(13) =62902786a(14) =328981007a(15) =1732617254a(16) =9181203778a(17) =48915412966a(18) =261868866141

External references