Expansion of c(5x^2)/(1-x*c(5x^2)), where c(x) is the g.f. of A000108.

Terms

a(0) =1a(1) =1a(2) =6a(3) =11a(4) =66a(5) =146a(6) =876a(7) =2131a(8) =12786a(9) =32966a(10) =197796a(11) =530526a(12) =3183156a(13) =8786436a(14) =52718616a(15) =148733571a(16) =892401426a(17) =2561439806a(18) =15368638836a(19) =44731364266a(20) =268388185596a(21) =790211926076