Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and the total absolute value of displacements not greater than 2*(n-1).
A263900
Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and the total absolute value of displacements not greater than 2*(n-1).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =61a(5) =185a(6) =577a(7) =1788a(8) =5540a(9) =17165a(10) =52991a(11) =163600a(12) =504983a(13) =1557494a(14) =4800848a(15) =14791118a(16) =45548176a(17) =140205732a(18) =431413253a(19) =1326980704a(20) =4080331096a(21) =12542893726a(22) =38546177015a(23) =118428377799a(24) =363772262171
External references
- oeis: A263900