Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 4 ones in any 4 X 4 X 4 subtriangle.
A153933
Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 4 ones in any 4 X 4 X 4 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =13a(4) =26a(5) =135a(6) =581a(7) =5081a(8) =33999a(9) =455470a(10) =5028919a(11) =110445068a(12) =1936072745a(13) =69174531647
External references
- oeis: A153933