Number of n X 3 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors.
A208859
Number of n X 3 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors.
Terms
- a(0) =5a(1) =127a(2) =5796a(3) =273049a(4) =12883280a(5) =607924387a(6) =28686344276
External references
- oeis: A208859