Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 0,2 or 1,2.
A264135
Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 0,2 or 1,2.
Terms
- a(0) =1a(1) =89a(2) =7921a(3) =178000a(4) =4000000a(5) =160564000a(6) =6445199524a(7) =219637743496
External references
- oeis: A264135