Number of (n+1)X(3+1) 0..3 arrays with every 2X2 subblock summing to 3 6 or 9.
A251295
Number of (n+1)X(3+1) 0..3 arrays with every 2X2 subblock summing to 3 6 or 9.
Terms
- a(0) =2356a(1) =22536a(2) =223164a(3) =2302844a(4) =24846540a(5) =280654684a(6) =3313122288a(7) =40698859196a(8) =517132372168
External references
- oeis: A251295