Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 7 ones in any 4 X 4 X 4 subtriangle.
A153953
Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 7 ones in any 4 X 4 X 4 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =14a(5) =27a(6) =101a(7) =792a(8) =2945a(9) =22285a(10) =347018a(11) =2474658a(12) =35967994a(13) =1067132131a(14) =14741727949a(15) =415083462852
External references
- oeis: A153953