Number of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock summing to 2, 4, or 6.
A251331
Number of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock summing to 2, 4, or 6.
Terms
- a(0) =3333a(1) =49937a(2) =801579a(3) =13857083a(4) =256067697a(5) =4998606173a(6) =101704182219
External references
- oeis: A251331