Expansion of (1+x*C)*C^4, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

A070857

Expansion of (1+x*C)*C^4, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

Terms

    a(0) =1a(1) =5a(2) =19a(3) =68a(4) =240a(5) =847a(6) =3003a(7) =10712a(8) =38454a(9) =138890a(10) =504526a(11) =1842392a(12) =6760390a(13) =24915555a(14) =92196075a(15) =342411120a(16) =1275977670a(17) =4769563590a(18) =17879195130a(19) =67197912600a(20) =253172676120a(21) =955992790038

External references