T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.

A221275

T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =4a(5) =0a(6) =1a(7) =4a(8) =0a(9) =0a(10) =0a(11) =25a(12) =0a(13) =16a(14) =0a(15) =0a(16) =52a(17) =100a(18) =16a(19) =0a(20) =0a(21) =0a(22) =196a(23) =0a(24) =1089a(25) =0a(26) =64a(27) =0a(28) =1a(29) =520

External references