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

A071719

Expansion of (1+x^2*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) =4a(2) =15a(3) =53a(4) =185a(5) =647a(6) =2277a(7) =8073a(8) =28834a(9) =103700a(10) =375326a(11) =1366290a(12) =4999717a(13) =18382405a(14) =67877025a(15) =251615745a(16) =936047790a(17) =3493585920a(18) =13077995730a(19) =49091198550a(20) =184742369370a(21) =696863109774

External references