1/120 the number of (n+1) X 5 0..4 arrays with every 2 X 2 subblock containing four distinct values.
A183617
1/120 the number of (n+1) X 5 0..4 arrays with every 2 X 2 subblock containing four distinct values.
Terms
- a(0) =216a(1) =4992a(2) =115760a(3) =2708848a(4) =63632480a(5) =1498220176a(6) =35321033072a(7) =833329037376
External references
- oeis: A183617