Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change -1,1 -1,2 1,0 or 0,-1.
A264555
Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change -1,1 -1,2 1,0 or 0,-1.
Terms
- a(0) =0a(1) =44a(2) =400a(3) =4640a(4) =105081a(5) =1994830a(6) =29691127a(7) =480994368a(8) =8117368800a(9) =132754460552
External references
- oeis: A264555