A027287 Self-convolution of array T given by A026009.

1, 2, 6, 15, 54, 118, 471, 973, 4128, 8262, 36481, 71534, 324876, 627926, 2911923, 5568348, 26241376, 49767432, 237550401, 447567059, 2158650078, 4045351674, 19679880649, 36716551814, 179920446576, 334415846660

Offset

0,2

Links

Table of n, a(n) for n=0..25.

Crossrefs

Sequence in context: A323926 A256982 A047870 * A192186 A243550 A354758

Adjacent sequences: A027284 A027285 A027286 * A027288 A027289 A027290

Keyword

nonn

Author

Clark Kimberling

Status

approved