Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.
A264631
Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.
Terms
- a(0) =1a(1) =8a(2) =22a(3) =108a(4) =684a(5) =2736a(6) =13556a(7) =68972a(8) =316068a(9) =1534532a(10) =7430832a(11) =35311040a(12) =170094764a(13) =817176616a(14) =3914397580a(15) =18804795120a(16) =90252696296a(17) =433011737840
External references
- oeis: A264631