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 5 X 5 X 5 subtriangle.
A153936
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 5 X 5 X 5 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =13a(4) =26a(5) =65a(6) =226a(7) =1291a(8) =7132a(9) =55130a(10) =379228a(11) =4264780a(12) =44700351a(13) =743555327a(14) =11220972023a(15) =261784540652
External references
- oeis: A153936