T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A318068

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =2a(7) =18a(8) =18a(9) =2a(10) =3a(11) =67a(12) =98a(13) =67a(14) =3a(15) =5a(16) =249a(17) =649a(18) =649a(19) =249a(20) =5a(21) =8a(22) =925a(23) =4003a(24) =7170a(25) =4003a(26) =925a(27) =8a(28) =13a(29) =3437

External references