A147684 - cp's OEIS frontend

A147684 Late-growing permutations: number of permutations of 3 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	5
3	420
4	40350
5	19369350
6	9212531290
7	13126885205000
8	17810026933803520
9	55560479543584645500
10	164686892656273830526336
11	953018107457232657556038400

[1, 1, 5, 420, 40350, 19369350, 9212531290, 13126885205000, 17810026933803520, 55560479543584645500, 164686892656273830526336, 953018107457232657556038400]

cp's OEIS Frontend

A147684 Late-growing permutations: number of permutations of 3 indistinguishable copies of 1..n with every partial sum <= the same partial sum averaged over all permutations.

Table of values

List of values