%I A026991
%S A026991 1,2,6,20,98,502,2126,8382,39624,203562,922944,3886840,18431462,
%T A026991 93930404,435553556,1893481706,9028569112,45794495192,214665970468,
%U A026991 950426429104
%N A026991 self-convolution of array T given by A026692.
%Y A026991 Sequence in context: A079570 A131842 A020095 this_sequence A049379 A003094 
               A073964
%Y A026991 Adjacent sequences: A026988 A026989 A026990 this_sequence A026992 A026993 
               A026994
%K A026991 nonn
%O A026991 0,2
%A A026991 Clark Kimberling (ck6(AT)evansville.edu)