A153919 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 2 ones in any 5 X 5 X 5 subtriangle.

1, 2, 1, 1, 2, 1, 2, 5, 4, 7, 14, 16, 20, 63, 57, 108, 299, 347, 613, 2185, 2276, 5449, 17797, 25318, 53655, 235092, 303467, 840222, 3331923, 5849149, 14333903