A147682 - cp's OEIS frontend

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.

n	a(n)
0	1
1	1
2	2
3	30
4	403
5	18720
6	746192
7	71892912
8	5873837638
9	951265850580
10	133244998049858
11	32484245570649180
12	6956417433946216990
13	2375465385671586163800
14	723157816455776560763294
15	329255781245519867317200240
16	135189844328107458501296074066
17	79079768375837127458516103725820

[1, 1, 2, 30, 403, 18720, 746192, 71892912, 5873837638, 951265850580, 133244998049858, 32484245570649180, 6956417433946216990, 2375465385671586163800, 723157816455776560763294, 329255781245519867317200240, 135189844328107458501296074066, 79079768375837127458516103725820]

cp's OEIS Frontend

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.

Table of values

List of values