%I A117748
%S A117748 0,3,6,15,21,36,45,66,78,105,120,153,171,210,231,276,300,351,378,435,
%T A117748 465,528,561,630,666,741,780,861,903,990,1035,1128,1176,1275,1326,1431,
%U A117748 1485,1596,1653,1770,1830,1953,2016,2145,2211,2346,2415,2556,2628,2775
%N A117748 Triangular numbers divisible by 3.
%Y A117748 Cf. A000217.
%Y A117748 Sequence in context: A162335 A095869 A069559 this_sequence A061066 A093799 
               A087359
%Y A117748 Adjacent sequences: A117745 A117746 A117747 this_sequence A117749 A117750 
               A117751
%K A117748 easy,nonn
%O A117748 1,2
%A A117748 Luc Stevens (lms022(AT)yahoo.com), Apr 29 2006