Number of nX5 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two.

A221379

Number of nX5 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) =8a(2) =0a(3) =189a(4) =0a(5) =5040a(6) =0a(7) =134521a(8) =0a(9) =3580920a(10) =0a(11) =95235525a(12) =0a(13) =2532193248a(14) =0a(15) =67323825121a(16) =0a(18) =0a(20) =0a(22) =0a(24) =0a(26) =0a(28) =0

External references