A027247 a(n) = self-convolution of row n of array T given by A026780.

1, 2, 11, 42, 216, 926, 4805, 21594, 113176, 523158, 2766030, 13043426, 69508528, 332880898, 1786840975, 8666578226, 46835595908, 229627064562, 1248785459646, 6180314464290, 33808696703208, 168713818115262, 927994263768204, 4665292098508258, 25791693351775736

Offset

0,2

Links

Table of n, a(n) for n=0..24.

Crossrefs

Sequence in context: A089658 A219100 A140322 * A141190 A048500 A197189

Adjacent sequences: A027244 A027245 A027246 * A027248 A027249 A027250

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Oct 26 2019

Status

approved