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

A302381

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

Terms

    a(0) =0a(1) =1a(2) =0a(3) =1a(4) =3a(5) =0a(6) =2a(7) =15a(8) =11a(9) =0a(10) =3a(11) =46a(12) =76a(13) =34a(14) =0a(15) =5a(16) =161a(17) =430a(18) =475a(19) =111a(20) =0a(21) =8a(22) =601a(23) =2886a(24) =4640a(25) =2771a(26) =361a(27) =0a(28) =13a(29) =2208

External references