Number of distinct even values of the (n-1)st difference of permutations of 1..n.
A174103
Number of distinct even values of the (n-1)st difference of permutations of 1..n.
Terms
- a(0) =0a(1) =1a(2) =11a(3) =5a(4) =63a(5) =23a(6) =355a(7) =269a(8) =1903a(9) =387a(10) =9281a(11) =1587a(12) =44457a(13) =94475a(14) =210337
External references
- oeis: A174103