Number of planar n X n X n binary triangular grids with no more than 2 ones in any similarly oriented 4 X 4 X 4 subtriangle.

A153556

Number of planar n X n X n binary triangular grids with no more than 2 ones in any similarly oriented 4 X 4 X 4 subtriangle.

Terms

    a(0) =1a(1) =2a(2) =7a(3) =22a(4) =56a(5) =314a(6) =2550a(7) =24293a(8) =250951a(9) =3887949a(10) =82407385a(11) =2243004307a(12) =76766225602

External references