%I A154037
%S A154037 0,14,8,0,29,0,0,33,0,0,27,0,0,27,0,0,27,0,0,27,0,0,27,0,0,27,0,0,27,0,
               0,
%T A154037 27,0,0,27,0,0,27,0,0,27,0,0,27,0,0,27,0,0,27,0,0,27,0,0,27,0,0
%N A154037 Number of planar triangular n X n X n nonnegative integer grids symmetric 
               under 120 degree rotation with every similarly oriented 3 X 3 X 3 
               subtriangle summing to 4.
%C A154037 Pattern 0 0 27 starts at n=11 and continues through at least n=60.
%e A154037 Maximal zeros solution for n=13
%e A154037 ..............0
%e A154037 .............0.2
%e A154037 ............2.0.0
%e A154037 ...........0.0.2.0
%e A154037 ..........0.2.0.0.2
%e A154037 .........2.0.0.2.0.0
%e A154037 ........0.0.2.0.0.2.0
%e A154037 .......0.2.0.0.2.0.0.2
%e A154037 ......2.0.0.2.0.0.2.0.0
%e A154037 .....0.0.2.0.0.2.0.0.2.0
%e A154037 ....0.2.0.0.2.0.0.2.0.0.2
%e A154037 ...2.0.0.2.0.0.2.0.0.2.0.0
%e A154037 ..0.0.2.0.0.2.0.0.2.0.0.2.0
%Y A154037 Sequence in context: A135638 A040185 A033964 this_sequence A119871 A010237 
               A035418
%Y A154037 Adjacent sequences: A154034 A154035 A154036 this_sequence A154038 A154039 
               A154040
%K A154037 nonn
%O A154037 3,2
%A A154037 Ron Hardin (rhhardin(AT)att.net) Jan 04 2009