Number of (n+1)X(4+1) 0..3 arrays with every 2X2 subblock summing to 3 6 or 9.
A251296
Number of (n+1)X(4+1) 0..3 arrays with every 2X2 subblock summing to 3 6 or 9.
Terms
- a(0) =12556a(1) =164480a(2) =2302844a(3) =34973116a(4) =579830068a(5) =10472034724a(6) =203797267488
External references
- oeis: A251296