Expansion of (1+x^3*C^2)*C^3, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

A071732

Expansion of (1+x^3*C^2)*C^3, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

Terms

    a(0) =1a(1) =3a(2) =9a(3) =29a(4) =95a(5) =317a(6) =1076a(7) =3707a(8) =12935a(9) =45630a(10) =162486a(11) =583338a(12) =2109190a(13) =7674157a(14) =28077250a(15) =103234695a(16) =381260535a(17) =1413686490a(18) =5260849110a(19) =19642116150a(20) =73557465570a(21) =276224933010

External references