A342660 - cp's OEIS frontend

A342660 The largest prime that divides the n-th multiply perfect number: a(n) = A006530(A007691(n)); a(1) = 1.

n	a(n)
1	1
2	3
3	7
4	5
5	31
6	7
7	127
8	7
9	13
10	31
11	19
12	31
13	8191
14	31
15	31
16	73
17	73
18	127
19	131071
20	19
21	19
22	89
23	151
24	127
25	524287
26	151
27	127
28	31
29	127
30	89
31	89
32	127
33	61
34	17
35	3851
36	1093
37	151
38	257
39	911
40	331
41	2147483647
42	3851
43	911
44	127
45	257
46	1093
47	331
48	331
49	337
50	337
51	337
52	257
53	683
54	3851
55	8191
56	1093
57	257
58	911
59	3851
60	1093
61	178481
62	8191
63	337
64	8191

[1, 3, 7, 5, 31, 7, 127, 7, 13, 31, 19, 31, 8191, 31, 31, 73, 73, 127, 131071, 19, 19, 89, 151, 127, 524287, 151, 127, 31, 127, 89, 89, 127, 61, 17, 3851, 1093, 151, 257, 911, 331, 2147483647, 3851, 911, 127, 257, 1093, 331, 331, 337, 337, 337, 257, 683, 3851, 8191, 1093, 257, 911, 3851, 1093, 178481, 8191, 337, 8191]

cp's OEIS Frontend

A342660 The largest prime that divides the n-th multiply perfect number: a(n) = A006530(A007691(n)); a(1) = 1.

Table of values

List of values