Number of (n+1)X(4+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.
A264624
Number of (n+1)X(4+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) =0a(1) =9a(2) =40a(3) =108a(4) =660a(5) =4032a(6) =19521a(7) =89469a(8) =449550a(9) =2308554a(10) =11454129a(11) =56190429a(12) =279105021a(13) =1393420077a(14) =6924459960a(15) =34329680172a(16) =170475275106a(17) =847412314182
External references
- oeis: A264624