%I #5 Apr 28 2021 00:13:47
%S 1,2,2,3,3,7,10,21,34,88,150,421,807,2708,6019,22444,58037,245472,
%T 706322,3364913,10967191,59955069,222028350,1374087876,5812458172,
%U 40846719268,195779164954,1558347753536,8466932734756,76665491618022,472779311230382
%N Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 1 one in any 4 X 4 X 4 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_, Jan 03 2009