%I A127128
%S A127128 1,2,9,54,412,3834,42131,533558,7645065,122177706,2153221318,
%T A127128 41464853266,865908079369,19484990264956,469910189792853,
%U A127128 12089047867952058,330423404118495975,9561012695542004496
%N A127128 Column 1 of triangle A127126.
%C A127128 Convolution square of A127131.
%Y A127128 Cf. A127126; A127131; other columns: A127127, A127129, A127130.
%Y A127128 Sequence in context: A073986 A089436 A000168 this_sequence A064151 A075679 
               A001757
%Y A127128 Adjacent sequences: A127125 A127126 A127127 this_sequence A127129 A127130 
               A127131
%K A127128 nonn
%O A127128 0,2
%A A127128 Paul D. Hanna (pauldhanna(AT)juno.com), Jan 05 2007