G.f. satisfies A(x) = 1 + x*cycle_index(G,A(x)) where G = cyclic group of order 7 generated by (1,2,...,7).

A036728

G.f. satisfies A(x) = 1 + x*cycle_index(G,A(x)) where G = cyclic group of order 7 generated by (1,2,...,7).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =4a(4) =15a(5) =62a(6) =274a(7) =1260a(8) =5973a(9) =28975a(10) =143176a(11) =718070a(12) =3645876a(13) =18703560a(14) =96799076a(15) =504797258a(16) =2649947859a(17) =13992164283a(18) =74262871273a(19) =395964705460

External references