Number of n X 2 0..3 arrays with all horizontally or vertically connected equal values in a straight line, and new values 0..3 introduced in row major order.
A223056
Number of n X 2 0..3 arrays with all horizontally or vertically connected equal values in a straight line, and new values 0..3 introduced in row major order.
Terms
- a(0) =2a(1) =10a(2) =114a(3) =1473a(4) =19360a(5) =255045a(6) =3361024a(7) =44294253a(8) =583749160a(9) =7693175205a(10) =101387647984
External references
- oeis: A223056