Number of n X 2 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.
A208858
Number of n X 2 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) =2a(1) =11a(2) =127a(3) =1691a(4) =23047a(5) =315203a(6) =4313071a(7) =59022155a(8) =807696535a(9) =11053048211a(10) =151257183487
External references
- oeis: A208858