Number of nX6 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two.

A221380

Number of nX6 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two.

Terms

    a(0) =0a(1) =16a(2) =0a(3) =1156a(4) =0a(5) =120409a(6) =0a(7) =13075456a(8) =0a(9) =1425817600a(10) =0a(11) =155542683321a(12) =0

External references