Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,0 0,1 1,0 -1,-2 or 0,2.
A264315
Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,0 0,1 1,0 -1,-2 or 0,2.
Terms
- a(0) =1a(1) =20a(2) =139a(3) =735a(4) =4103a(5) =24153a(6) =137703a(7) =781453a(8) =4441735a(9) =25301221a(10) =144075295a(11) =820164205a(12) =4668417719a(13) =26575597941a(14) =151287649935a(15) =861229928957
External references
- oeis: A264315