Expansion of 1/((1 - x^2)*(2 - c(x))), where c(x) is the g.f. of A000108.

A106269

Expansion of 1/((1 - x^2)*(2 - c(x))), where c(x) is the g.f. of A000108.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =11a(4) =39a(5) =137a(6) =501a(7) =1853a(8) =6936a(9) =26163a(10) =99314a(11) =378879a(12) =1451392a(13) =5579179a(14) =21509692a(15) =83137939a(16) =322049887a(17) =1249941049a(18) =4859617537a(19) =18922572949a(20) =73782881947a(21) =288051510169

External references