T(n,k) is the number of n X k 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors).
A208353
T(n,k) is the number of n X k 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors).
Terms
- a(0) =1a(1) =2a(2) =2a(3) =5a(4) =15a(5) =5a(6) =15a(7) =100a(8) =100a(9) =15a(10) =51a(11) =868a(12) =1095a(13) =868a(14) =51a(15) =187a(16) =7780a(17) =12625a(18) =12625a(19) =7780a(20) =187a(21) =715a(22) =69988a(23) =153237a(24) =230387a(25) =153237a(26) =69988a(27) =715a(28) =2795a(29) =629860
External references
- oeis: A208353