%I A117404
%S A117404 0,1,10,36,153,171,351,630,1035,1431,2016,3240,3321,4005,8001,10440,
%T A117404 13041,13203,16110,21321,23220,25200,67896,89676,101025,105111,114003,
%U A117404 186966,187578,198765,222111,239778,279378,292995,299925,320400,321201
%N A117404 Triangular numbers for which the sum of the digits is a square.
%e A117404 67896 is in the sequence because (1) it is a triangular number and (2) 
               the sum of its digits 6+7+8+9+6=36 is a square.
%Y A117404 Cf. A000217.
%Y A117404 Sequence in context: A051959 A117327 A153371 this_sequence A089222 A139242 
               A139236
%Y A117404 Adjacent sequences: A117401 A117402 A117403 this_sequence A117405 A117406 
               A117407
%K A117404 base,nonn
%O A117404 0,3
%A A117404 Luc Stevens (lms022(AT)yahoo.com), Apr 26 2006