%I A117945
%S A117945 1,0,1,1,0,1,0,0,0,1,0,0,0,0,1,0,0,0,1,0,1,1,0,0,0,0,0,1,0,1,0,0,0,0,0,
               1,1,0,1,0,
%T A117945 0,0,1,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
               1,0,1,0,0,0,0,
%U A117945 0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0
%V A117945 1,0,1,-1,0,1,0,0,0,1,0,0,0,0,1,0,0,0,-1,0,1,-1,0,0,0,0,0,1,0,-1,0,0,0,
               0,0,1,1,0,-1,0,
%W A117945 0,0,-1,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
               0,-1,0,1,0,0,0,0,
%X A117945 0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0
%N A117945 Triangle related to powers of 3 partitions of n.
%C A117945 Row sums are A039966. Inverse of A117944.
%F A117945 Triangle begins 1, 0, 1, -1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 
               -1, 0, 1, -1, 0, 0, 0, 0, 0, 1, 0, -1, 0, 0, 0, 0, 0, 1, 1, 0, -1, 
               0, 0, 0, -1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 
               0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 1
%Y A117945 Sequence in context: A093317 A127253 A117944 this_sequence A128937 A102511 
               A129360
%Y A117945 Adjacent sequences: A117942 A117943 A117944 this_sequence A117946 A117947 
               A117948
%K A117945 sign
%O A117945 0,1
%A A117945 Paul Barry (pbarry(AT)wit.ie), Apr 05 2006