Late-growing permutations: number of permutations of 2 indistinguishable copies of 1..n with every partial sum <= the same partial sum averaged over all permutations.
A147682
Late-growing permutations: number of permutations of 2 indistinguishable copies of 1..n with every partial sum <= the same partial sum averaged over all permutations.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =30a(4) =403a(5) =18720a(6) =746192a(7) =71892912a(8) =5873837638a(9) =951265850580
External references
- oeis: A147682