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

A221308

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

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =5a(5) =0a(6) =1a(7) =10a(8) =10a(9) =1a(10) =0a(11) =31a(12) =0a(13) =31a(14) =0a(15) =0a(16) =90a(17) =312a(18) =312a(19) =90a(20) =0a(21) =0a(22) =259a(23) =0a(24) =3334a(25) =0a(26) =259a(27) =0a(28) =1a(29) =746

External references