Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change -1,1 1,0 1,-1 or 0,-1.
A264332
Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change -1,1 1,0 1,-1 or 0,-1.
Terms
- a(0) =1a(1) =8a(2) =40a(3) =240a(4) =1528a(5) =8976a(6) =51904a(7) =302328a(8) =1757848a(9) =10199400a(10) =59182576a(11) =343432200a(12) =1992680992a(13) =11561675184a(14) =67081902808a(15) =389213984040
External references
- oeis: A264332