T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every element equal to some horizontal, vertical or antidiagonal neighbor, with top left element zero.

A232038

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every element equal to some horizontal, vertical or antidiagonal neighbor, with top left element zero.

Terms

    a(0) =3a(1) =11a(2) =11a(3) =37a(4) =76a(5) =37a(6) =129a(7) =521a(8) =521a(9) =129a(10) =450a(11) =3588a(12) =6958a(13) =3588a(14) =450a(15) =1568a(16) =24719a(17) =94102a(18) =94102a(19) =24719a(20) =1568a(21) =5464a(22) =170270a(23) =1272579a(24) =2504637a(25) =1272579a(26) =170270a(27) =5464a(28) =19041a(29) =1172854

External references