1/3 the number of n X 3 0..2 arrays with no element equal both to the element above and to the element to its left.

A184688

1/3 the number of n X 3 0..2 arrays with no element equal both to the element above and to the element to its left.

Terms

    a(0) =9a(1) =192a(2) =4080a(3) =86688a(4) =1841856a(5) =39133824a(6) =831474432a(7) =17666296320a(8) =375354928128

External references