G.f.: A(x) = 1/C(-x*T(x)^3), where C(x) = 1 + x*C(x)^2 is the g.f. of A000108 and T(x) = 1 + x*T(x)^3 is the g.f. of A001764.
A347953
G.f.: A(x) = 1/C(-x*T(x)^3), where C(x) = 1 + x*C(x)^2 is the g.f. of A000108 and T(x) = 1 + x*T(x)^3 is the g.f. of A001764.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =8a(4) =35a(5) =171a(6) =882a(7) =4744a(8) =26286a(9) =149045a(10) =860596a(11) =5042968a(12) =29913676a(13) =179270434a(14) =1083794310a(15) =6601817952a(16) =40479778395a(17) =249646876065
External references
- oeis: A347953