Expansion of 1/(1+5*x*c(x)), c(x) the g.f. of Catalan numbers A000108.

A126987

Expansion of 1/(1+5*x*c(x)), c(x) the g.f. of Catalan numbers A000108.

Terms

    a(0) =1a(1) =-5a(2) =20a(3) =-85a(4) =350a(5) =-1470a(6) =6090a(7) =-25485a(8) =105830a(9) =-442150a(10) =1838240a(11) =-7673330a(12) =31923220a(13) =-133186760a(14) =554325750a(15) =-2311919325a(16) =9624918150a(17) =-40133290350a(18) =167114005800a(19) =-696706389750

External references