Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 9 ones in any 4 X 4 X 4 subtriangle.
A153966
Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 9 ones in any 4 X 4 X 4 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =16a(4) =63a(5) =503a(6) =3962a(7) =62593a(8) =985280a(9) =31115163a(10) =978497307a(11) =61716861576
External references
- oeis: A153966