A151882 - cp's OEIS frontend

A151882 Let g be a permutation of [1..n] having say j_i cycles of length i, with Sum_i i*j_i = n; sequence gives Sum_g Sum_i (j_i)^2.

n	a(n)
1	1
2	5
3	17
4	80
5	424
6	2744
7	19928
8	166984
9	1543176
10	15939792
11	178966512
12	2200820544
13	29089668672
14	415261531008
15	6316101256320
16	102692213061120
17	1766690411927040
18	32235156493470720
19	618870347081671680
20	12523381062124032000
21	265423904312781312000

[1, 5, 17, 80, 424, 2744, 19928, 166984, 1543176, 15939792, 178966512, 2200820544, 29089668672, 415261531008, 6316101256320, 102692213061120, 1766690411927040, 32235156493470720, 618870347081671680, 12523381062124032000, 265423904312781312000]

cp's OEIS Frontend

A151882 Let g be a permutation of [1..n] having say j_i cycles of length i, with Sum_i i*j_i = n; sequence gives Sum_g Sum_i (j_i)^2.

Table of values

List of values