Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change -1,1 1,0 1,-1 or 0,-1.
A264331
Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change -1,1 1,0 1,-1 or 0,-1.
Terms
- a(0) =1a(1) =4a(2) =11a(3) =40a(4) =133a(5) =464a(6) =1573a(7) =5373a(8) =18376a(9) =62754a(10) =214317a(11) =732135a(12) =2500884a(13) =8542281a(14) =29179002a(15) =99670233a(16) =340453584a(17) =1162924217a(18) =3972328112a(19) =13568709449a(20) =46348108164a(21) =158316261005a(22) =540777999819
External references
- oeis: A264331