A349148 - cp's OEIS frontend

A349148 Number of unordered n-tuples {x_1, x_2, x_3, ..., x_n} such that Sum_{k=1..n} 1/x_k is an integer and x_k is an integer between 1 and n for 1 <= k <= n.

n	a(n)
0	1
1	1
2	2
3	3
4	6
5	9
6	25
7	39
8	84
9	158
10	381
11	610
12	2175
13	3489
14	7252
15	24744
16	54658
17	89031
18	273604
19	443746
20	1690517
21	5261990
22	9399018
23	15470605
24	58261863
25	102574465

[1, 1, 2, 3, 6, 9, 25, 39, 84, 158, 381, 610, 2175, 3489, 7252, 24744, 54658, 89031, 273604, 443746, 1690517, 5261990, 9399018, 15470605, 58261863, 102574465]

cp's OEIS Frontend

A349148 Number of unordered n-tuples {x_1, x_2, x_3, ..., x_n} such that Sum_{k=1..n} 1/x_k is an integer and x_k is an integer between 1 and n for 1 <= k <= n.

Table of values

List of values