A027760 - cp's OEIS frontend

A027760 Denominator of Sum_{p prime, p-1 divides n} 1/p.

n	a(n)
1	2
2	6
3	2
4	30
5	2
6	42
7	2
8	30
9	2
10	66
11	2
12	2730
13	2
14	6
15	2
16	510
17	2
18	798
19	2
20	330
21	2
22	138
23	2
24	2730
25	2
26	6
27	2
28	870
29	2
30	14322
31	2
32	510
33	2
34	6
35	2
36	1919190
37	2
38	6
39	2
40	13530
41	2
42	1806
43	2
44	690
45	2
46	282
47	2
48	46410
49	2
50	66
51	2
52	1590
53	2
54	798
55	2
56	870
57	2
58	354
59	2
60	56786730
61	2
62	6
63	2
64	510
65	2

[2, 6, 2, 30, 2, 42, 2, 30, 2, 66, 2, 2730, 2, 6, 2, 510, 2, 798, 2, 330, 2, 138, 2, 2730, 2, 6, 2, 870, 2, 14322, 2, 510, 2, 6, 2, 1919190, 2, 6, 2, 13530, 2, 1806, 2, 690, 2, 282, 2, 46410, 2, 66, 2, 1590, 2, 798, 2, 870, 2, 354, 2, 56786730, 2, 6, 2, 510, 2]

cp's OEIS Frontend

A027760 Denominator of Sum_{p prime, p-1 divides n} 1/p.

Table of values

List of values