A027247 - OEIS

%I #8 Oct 26 2019 16:16:14

%S 1,2,11,42,216,926,4805,21594,113176,523158,2766030,13043426,69508528,

%T 332880898,1786840975,8666578226,46835595908,229627064562,

%U 1248785459646,6180314464290,33808696703208,168713818115262,927994263768204,4665292098508258,25791693351775736

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

%K nonn

%O 0,2

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Oct 26 2019