Expansion of (1/(1-x))*c(x/((1-x)*(1-x^2))) where c(x) is the g.f. of A000108.
A188314
Expansion of (1/(1-x))*c(x/((1-x)*(1-x^2))) where c(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =16a(4) =57a(5) =219a(6) =883a(7) =3687a(8) =15803a(9) =69128a(10) =307363a(11) =1385003a(12) =6310869a(13) =29028616a(14) =134610771a(15) =628612921a(16) =2953640371a(17) =13953726888a(18) =66240021987a(19) =315812059436
External references
- oeis: A188314