T(n,k) = Number of n X k 0..4 arrays with no element equal to another at a city block distance of exactly two, and new values 0..4 introduced in row major order.

A222944

T(n,k) = Number of n X k 0..4 arrays with no element equal to another at a city block distance of exactly two, and new values 0..4 introduced in row major order.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =3a(4) =7a(5) =3a(6) =7a(7) =33a(8) =33a(9) =7a(10) =20a(11) =273a(12) =420a(13) =273a(14) =20a(15) =66a(16) =2433a(17) =5880a(18) =5880a(19) =2433a(20) =66a(21) =238a(22) =21873a(23) =82320a(24) =130680a(25) =82320a(26) =21873a(27) =238a(28) =902a(29) =196833

External references