Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and the total absolute value of displacements not greater than 2*(n-1).
A263901
Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 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) =76a(5) =269a(6) =979a(7) =3552a(8) =13068a(9) =47999a(10) =177283a(11) =655064a(12) =2425417a(13) =8986341a(14) =33341753a(15) =123816292a(16) =460226315a(17) =1711870476a(18) =6371885563a(19) =23731057146a(20) =88430326347a(21) =329681018798
External references
- oeis: A263901