%I A026580
%S A026580 1,2,5,12,30,75,189,478,1211,3076,7818,19901,50680,129179,329383,
%T A026580 840336,2144540,5474889,13980493,35709394,91228015,233108456,
%U A026580 595740568,1522725379,3892624055,9952119054,25446913766,65072487645
%N A026580 T(n,0) + T(n,1) + ... + T(n,n), T given by A026568.
%Y A026580 Sequence in context: A000106 A076883 A140832 this_sequence A092247 A108360 
               A051163
%Y A026580 Adjacent sequences: A026577 A026578 A026579 this_sequence A026581 A026582 
               A026583
%K A026580 nonn
%O A026580 0,2
%A A026580 Clark Kimberling (ck6(AT)evansville.edu)