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

0,2

Links

Table of n, a(n) for n=0..20.

Maple

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

Crossrefs

Sequence in context: A317867 A092438 A240296 * A027231 A083845 A027239

Adjacent sequences: A027204 A027205 A027206 * A027208 A027209 A027210

Keyword

nonn

Author

Clark Kimberling

Status

approved