A339481 - cp's OEIS frontend

A339481 a(n) = Sum_{d|n} d^(n-d) * binomial(d+n/d-2, d-1).

n	a(n)
1	1
2	2
3	2
4	10
5	2
6	131
7	2
8	1282
9	4376
10	16907
11	2
12	1138272
13	2
14	5793475
15	154455992
16	469893122
17	2
18	49501130330
19	2
20	1318441711177
21	19001093813466
22	3138439911059
23	2
24	15989399214596398
25	6675720214843752
26	3937376603803099
27	6754271297694102092
28	47097064577536888014
29	2

[1, 2, 2, 10, 2, 131, 2, 1282, 4376, 16907, 2, 1138272, 2, 5793475, 154455992, 469893122, 2, 49501130330, 2, 1318441711177, 19001093813466, 3138439911059, 2, 15989399214596398, 6675720214843752, 3937376603803099, 6754271297694102092, 47097064577536888014, 2]

cp's OEIS Frontend

A339481 a(n) = Sum_{d|n} d^(n-d) * binomial(d+n/d-2, d-1).

Table of values

List of values