Number of nX4 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value 2-x(i,j).

A229843

Number of nX4 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value 2-x(i,j).

Terms

    a(0) =9a(1) =423a(2) =13401a(3) =453837a(4) =15269193a(5) =514371027a(6) =17324310663a(7) =583513743897

External references