A111233 - cp's OEIS frontend

A111233 Number of nonempty subsets of {1, 1/2, 1/3, ..., 1/n} that sum to an integer.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	3
7	3
8	3
9	3
10	3
11	3
12	5
13	5
14	5
15	11
16	11
17	11
18	21
19	21
20	43
21	43
22	43
23	43
24	83
25	83
26	83
27	83
28	255
29	255
30	449
31	449
32	449
33	895
34	895
35	1407
36	2111
37	2111
38	2111
39	2111
40	4159
41	4159
42	8319
43	8319
44	8319
45	16639
46	16639
47	16639
48	33279
49	33279
50	33279
51	33279
52	66559
53	66559
54	122019

[1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 5, 5, 5, 11, 11, 11, 21, 21, 43, 43, 43, 43, 83, 83, 83, 83, 255, 255, 449, 449, 449, 895, 895, 1407, 2111, 2111, 2111, 2111, 4159, 4159, 8319, 8319, 8319, 16639, 16639, 16639, 33279, 33279, 33279, 33279, 66559, 66559, 122019]

cp's OEIS Frontend

A111233 Number of nonempty subsets of {1, 1/2, 1/3, ..., 1/n} that sum to an integer.

Table of values

List of values