A151884 - cp's OEIS frontend

A151884 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 odd} (j_i)^2.

n	a(n)
1	1
2	4
3	14
4	56
5	304
6	1904
7	14048
8	112384
9	1051776
10	10662912
11	120920832
12	1451049984
13	19342651392
14	272576268288
15	4175822315520
16	66813157048320
17	1156746459709440
18	20900477925457920
19	403511454289428480
20	8070229085788569600
21	171907712809736601600

[1, 4, 14, 56, 304, 1904, 14048, 112384, 1051776, 10662912, 120920832, 1451049984, 19342651392, 272576268288, 4175822315520, 66813157048320, 1156746459709440, 20900477925457920, 403511454289428480, 8070229085788569600, 171907712809736601600]

cp's OEIS Frontend

A151884 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 odd} (j_i)^2.

Table of values

List of values