Number of n X 3 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any horizontal, vertical or antidiagonal neighbor (colorings ignoring permutations of colors).
A208044
Number of n X 3 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any horizontal, vertical or antidiagonal neighbor (colorings ignoring permutations of colors).
Terms
- a(0) =2a(1) =8a(2) =44a(3) =244a(4) =1356a(5) =7540a(6) =41932a(7) =233204a(8) =1296972a(9) =7213172a(10) =40116428a(11) =223109620a(12) =1240835916a(13) =6900974452a(14) =38380133836a(15) =213453141236
External references
- oeis: A208044