Number of nX3 0..4 arrays with no three equal values in a row horizontally or vertically, and new values 0..4 introduced in row major order.
A222921
Number of nX3 0..4 arrays with no three equal values in a row horizontally or vertically, and new values 0..4 introduced in row major order.
Terms
- a(0) =4a(1) =174a(2) =13571a(3) =1396408a(4) =149478882a(5) =16132176644
External references
- oeis: A222921