A145164 G.f. A(x) satisfies A(x/A(x)) = 1/(1-x)^4.

1, 4, 26, 268, 3851, 69308, 1459552, 34513468, 893162569, 24873809192, 736914860764, 23034718900652, 755096654861093, 25838920473462512, 919688365896843632, 33951797935609852260, 1296987353334993492885

Offset: 0

Author

Paul D. Hanna, Oct 03 2008

Keywords

• nonn

Crossrefs

Cf. A145162, A145163.

Programs

PARI

{a(n)=local(A=1+x+x*O(x^n),B);for(n=0,n,B=serreverse(x/A);A=1/(1-B)^4);polcoeff(A,n)}

Formula

Self-convolution 4th power of A145162.

Self-convolution square of A145163.