A153996 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 11 ones in any 5 X 5 X 5 subtriangle.

1, 2, 2, 4, 8, 12, 26, 101, 183, 703, 2877, 10411, 40654, 329616, 1193895, 9029186, 73784076, 520396717, 3984125165, 63450006981, 453313410587, 6773173674923, 109501240761989, 1529036617116906, 23146045371160181, 731081927354538564