Number of nX2 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).
A208347
Number of nX2 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) =2a(1) =15a(2) =100a(3) =868a(4) =7780a(5) =69988a(6) =629860a(7) =5668708a(8) =51018340a(9) =459165028a(10) =4132485220a(11) =37192366948a(12) =334731302500
External references
- oeis: A208347