Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 2 ones in any 3 X 3 X 3 subtriangle.
A153911
Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 2 ones in any 3 X 3 X 3 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =412a(3) =3309a(4) =6170a(5) =28173a(6) =363650a(7) =995263a(8) =7017397a(9) =125707566a(10) =496907299a(11) =5084773943a(12) =131364083278a(13) =749724226722
External references
- oeis: A153911