Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 9 ones in any 5 X 5 X 5 subtriangle.
A153968
Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 9 ones in any 5 X 5 X 5 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =15a(5) =26a(6) =94a(7) =703a(8) =2648a(9) =19064a(10) =286301a(11) =1973740a(12) =27808647a(13) =785297090a(14) =10274423975a(15) =271526039324
External references
- oeis: A153968