1/3 the number of nX7 0..2 arrays with no element equal both to the element above and to the element to its left.
A184692
1/3 the number of nX7 0..2 arrays with no element equal both to the element above and to the element to its left.
Terms
- a(0) =729a(1) =786432a(2) =831474432a(3) =878052505824
External references
- oeis: A184692