Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change -1,0 0,2 -1,-2 or 1,0.
A264516
Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change -1,0 0,2 -1,-2 or 1,0.
Terms
- a(0) =2a(1) =2a(2) =42a(3) =228a(4) =1644a(5) =10368a(6) =65182a(7) =414414a(8) =2603670a(9) =16540506a(10) =104489208a(11) =662121980a(12) =4188014160a(13) =26506383680a(14) =167699955140
External references
- oeis: A264516