Number of (3+1) X (n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.
A264424
Number of (3+1) X (n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.
Terms
- a(0) =1a(1) =20a(2) =96a(3) =499a(4) =2681a(5) =15088a(6) =86469a(7) =479787a(8) =2666733a(9) =14940857a(10) =83531649a(11) =466766772a(12) =2608467230a(13) =14576309209a(14) =81469725947a(15) =455319456892
External references
- oeis: A264424