A145159 G.f. A(x) satisfies A(x/A(x)) = 1/(1-x)^2.

1, 2, 7, 38, 283, 2624, 28408, 344972, 4580833, 65410070, 992850781, 15888876224, 266464473274, 4661494891166, 84761554257517, 1597453996121132, 31132664696108551, 626239933178389916, 12981131500452667888

Offset: 0

Author

Paul D. Hanna, Oct 03 2008

Keywords

• nonn

Crossrefs

Cf. A145158.

Programs

PARI

{a(n)=local(A=1+x+x*O(x^n));for(n=0,n,B=serreverse(x/A);A=1/(1-B)^2);polcoeff(A,n)}

Formula

Self-convolution of A145158.