A154002 - OEIS

A154002

Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 13 ones in any 5 X 5 X 5 subtriangle.

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

%S 1,2,2,4,8,15,30,121,231,922,3737,14596,58211,469831,1835827,14554240,

%T 117947573,917117580,7292920219,117680064956,918073021793,

%U 14535229309434,235458669342831,3657602835082750,58133874029508411,1875022386576869767

%N Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 13 ones in any 5 X 5 X 5 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_ Jan 04 2009