A355933 - cp's OEIS frontend

A355933 a(n) = A003973(n) / gcd(sigma(n), A003973(n)), where A003973(n) = sigma(A003961(n)) and A003961 is fully multiplicative with a(p) = nextprime(p).

n	a(n)
1	1
2	4
3	3
4	13
5	4
6	2
7	3
8	8
9	31
10	16
11	7
12	39
13	9
14	2
15	2
16	121
17	10
18	124
19	6
20	52
21	9
22	14
23	5
24	4
25	57
26	12
27	39
28	39
29	16
30	8
31	19
32	52
33	7
34	40
35	2
36	31
37	21
38	8
39	27
40	32
41	22
42	3
43	12
44	13
45	124
46	5
47	9
48	363
49	7
50	76
51	5
52	117
53	10
54	26
55	14
56	4
57	9
58	64
59	31
60	26
61	34
62	19
63	93
64	1093
65	12
66	7
67	18
68	130
69	15
70	8
71	37
72	248
73	40
74	28
75	171
76	78
77	7
78	18
79	21
80	484
81	71
82	88
83	15
84	117

[1, 4, 3, 13, 4, 2, 3, 8, 31, 16, 7, 39, 9, 2, 2, 121, 10, 124, 6, 52, 9, 14, 5, 4, 57, 12, 39, 39, 16, 8, 19, 52, 7, 40, 2, 31, 21, 8, 27, 32, 22, 3, 12, 13, 124, 5, 9, 363, 7, 76, 5, 117, 10, 26, 14, 4, 9, 64, 31, 26, 34, 19, 93, 1093, 12, 7, 18, 130, 15, 8, 37, 248, 40, 28, 171, 78, 7, 18, 21, 484, 71, 88, 15, 117]

cp's OEIS Frontend

A355933 a(n) = A003973(n) / gcd(sigma(n), A003973(n)), where A003973(n) = sigma(A003961(n)) and A003961 is fully multiplicative with a(p) = nextprime(p).

Table of values

List of values