login
Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 5 ones in any 4 X 4 X 4 subtriangle.
0

%I #3 Mar 31 2012 12:35:21

%S 1,2,2,3,4,8,14,49,79,253,741,2335,6399,37905,102246,593203,2884877,

%T 16569870,80670284,832584915,3998999249,40528587997,352270529241,

%U 3516190442125,29997079375598,543310308646601,4559849026688799

%N Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 5 ones in any 4 X 4 X 4 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_ Jan 03 2009