Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and exactly two more elements moved upwards than downwards.
A263783
Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and exactly two more elements moved upwards than downwards.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =5a(5) =37a(6) =116a(7) =572a(8) =2042a(9) =9298a(10) =35064a(11) =149613a(12) =562785a(13) =2272083a(14) =8551255a(15) =33698121a(16) =127422730a(17) =495208463a(18) =1874278884a(19) =7209869659a(20) =27281399998a(21) =104270642849a(22) =394494583551
External references
- oeis: A263783