1/3 the number of nX8 0..2 arrays with no element equal both to the element above and to the element to its left.
A184693
1/3 the number of nX8 0..2 arrays with no element equal both to the element above and to the element to its left.
Terms
- a(0) =2187a(1) =6291456a(2) =17666296320
External references
- oeis: A184693