A027207 Self-convolution of row n of array T given by A026725.

1, 2, 6, 26, 91, 414, 1519, 6980, 26176, 120596, 457880, 2110422, 8076044, 37211408, 143165518, 659264978, 2546261659, 11717539646, 45387607779, 208729977124, 810316893827

Offset: 0

Author

Clark Kimberling

Keywords

• nonn

Programs

Maple

A027207 := proc(n)
    add( A026725(n,k)*A026725(n,n-k),k=0..n) ;
end proc: # R. J. Mathar, Oct 21 2019