1/3 the number of n X 4 0..2 arrays with no element equal both to the element above and to the element to its left.

A184689

1/3 the number of n X 4 0..2 arrays with no element equal both to the element above and to the element to its left.

Terms

    a(0) =27a(1) =1536a(2) =86688a(3) =4890528a(4) =275895264a(5) =15564399648a(6) =878052505824

External references