1/120 the number of (n+1) X 4 0..4 arrays with every 2 X 2 subblock containing four distinct values.
A183616
1/120 the number of (n+1) X 4 0..4 arrays with every 2 X 2 subblock containing four distinct values.
Terms
- a(0) =36a(1) =528a(2) =7792a(3) =115760a(4) =1724208a(5) =25713200a(6) =383674672a(7) =5726373936a(8) =85476349744
External references
- oeis: A183616