Number of nX2 0..4 arrays with no three equal values in a row horizontally or vertically, and new values 0..4 introduced in row major order.
A222920
Number of nX2 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) =2a(1) =15a(2) =174a(3) =3183a(4) =68076a(5) =1543538a(6) =35663142a(7) =829049736a(8) =19310392822a(9) =450063924406
External references
- oeis: A222920