A069519 - cp's OEIS frontend

A069519 Numbers k such that 1/(Sum_{d|k} (-1)^d/d) is an integer.

n	a(n)
1	1
2	2
3	4
4	8
5	12
6	16
7	24
8	32
9	48
10	56
11	64
12	96
13	112
14	120
15	128
16	192
17	224
18	240
19	256
20	384
21	448
22	480
23	512
24	528
25	672
26	768
27	896
28	960
29	992
30	1024
31	1056
32	1344
33	1456
34	1536
35	1792
36	1920
37	1984
38	2048
39	2112
40	2160
41	2208
42	2688
43	2912
44	3072
45	3584
46	3840
47	3968
48	4096
49	4224
50	4320

[1, 2, 4, 8, 12, 16, 24, 32, 48, 56, 64, 96, 112, 120, 128, 192, 224, 240, 256, 384, 448, 480, 512, 528, 672, 768, 896, 960, 992, 1024, 1056, 1344, 1456, 1536, 1792, 1920, 1984, 2048, 2112, 2160, 2208, 2688, 2912, 3072, 3584, 3840, 3968, 4096, 4224, 4320]

cp's OEIS Frontend

A069519 Numbers k such that 1/(Sum_{d|k} (-1)^d/d) is an integer.

Table of values

List of values