%I #3 Mar 31 2012 12:35:21
%S 1,1,4,10,45,327,2795,37386,708255,18674478,714577926,38756649867,
%T 2991760323799,329930606705391,51795338953514297,11590318613952416039,
%U 3697221054959107433421,1680594967102679237735428
%N Number of planar n X n X n binary triangular grids with every one adjacent to exactly 1 other one.
%K nonn
%O 0,3
%A _R. H. Hardin_ Jan 04 2009