Number of permutations sigma of [n] such that all values sigma(k)/k for 1 <= k <= n are pairwise distinct.
A333082
Number of permutations sigma of [n] such that all values sigma(k)/k for 1 <= k <= n are pairwise distinct.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =13a(5) =79a(6) =345a(7) =2785a(8) =19595a(9) =171141a(10) =1555181a(11) =18998391a(12) =184988197a(13) =2675065491a(14) =35582840563a(15) =490186693669
External references
- oeis: A333082