Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 4 X 4 X 4 subtriangle.
A153942
Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 4 X 4 X 4 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =15a(4) =38a(5) =236a(6) =1250a(7) =13966a(8) =128542a(9) =2461620a(10) =40144584a(11) =1355506385a(12) =38359079886
External references
- oeis: A153942