Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 5 ones in any 3 X 3 X 3 subtriangle.
A153938
Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 5 ones in any 3 X 3 X 3 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =3a(4) =15a(5) =24a(6) =95a(7) =901a(8) =2926a(9) =22625a(10) =415047a(11) =2632895a(12) =39794767a(13) =1442122393a(14) =17977314936a(15) =535815289761
External references
- oeis: A153938