A346467 - cp's OEIS frontend

A346467 a(n) is the least common multiple of the divisors d of n-1 such that d+1 is prime; a(1) = 1.

n	a(n)
1	1
2	1
3	2
4	1
5	4
6	1
7	6
8	1
9	4
10	1
11	10
12	1
13	12
14	1
15	2
16	1
17	16
18	1
19	18
20	1
21	20
22	1
23	22
24	1
25	12
26	1
27	2
28	1
29	28
30	1
31	30
32	1
33	16
34	1
35	2
36	1
37	36
38	1
39	2
40	1
41	40
42	1
43	42
44	1
45	44
46	1
47	46
48	1
49	48
50	1
51	10
52	1
53	52
54	1
55	18
56	1
57	28
58	1
59	58
60	1
61	60
62	1
63	2
64	1
65	16
66	1
67	66
68	1
69	4
70	1
71	70
72	1
73	72
74	1
75	2
76	1
77	4
78	1
79	78
80	1
81	80
82	1
83	82
84	1
85	84
86	1
87	2
88	1
89	88
90	1
91	90
92	1
93	92
94	1
95	2
96	1
97	96

[1, 1, 2, 1, 4, 1, 6, 1, 4, 1, 10, 1, 12, 1, 2, 1, 16, 1, 18, 1, 20, 1, 22, 1, 12, 1, 2, 1, 28, 1, 30, 1, 16, 1, 2, 1, 36, 1, 2, 1, 40, 1, 42, 1, 44, 1, 46, 1, 48, 1, 10, 1, 52, 1, 18, 1, 28, 1, 58, 1, 60, 1, 2, 1, 16, 1, 66, 1, 4, 1, 70, 1, 72, 1, 2, 1, 4, 1, 78, 1, 80, 1, 82, 1, 84, 1, 2, 1, 88, 1, 90, 1, 92, 1, 2, 1, 96]

cp's OEIS Frontend

A346467 a(n) is the least common multiple of the divisors d of n-1 such that d+1 is prime; a(1) = 1.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	4
6	1
7	6
8	1
9	4
10	1
11	10
12	1
13	12
14	1
15	2
16	1
17	16
18	1
19	18
20	1
21	20
22	1
23	22
24	1
25	12
26	1
27	2
28	1
29	28
30	1
31	30
32	1
33	16
34	1
35	2
36	1
37	36
38	1
39	2
40	1
41	40
42	1
43	42
44	1
45	44
46	1
47	46
48	1
49	48
50	1
51	10
52	1
53	52
54	1
55	18
56	1
57	28
58	1
59	58
60	1
61	60
62	1
63	2
64	1
65	16
66	1
67	66
68	1
69	4
70	1
71	70
72	1
73	72
74	1
75	2
76	1
77	4
78	1
79	78
80	1
81	80
82	1
83	82
84	1
85	84
86	1
87	2
88	1
89	88
90	1
91	90
92	1
93	92
94	1
95	2
96	1
97	96

n	a(n)
1	1
2	1
3	2
4	1
5	4
6	1
7	6
8	1
9	4
10	1
11	10
12	1
13	12
14	1
15	2
16	1
17	16
18	1
19	18
20	1
21	20
22	1
23	22
24	1
25	12
26	1
27	2
28	1
29	28
30	1
31	30
32	1
33	16
34	1
35	2
36	1
37	36
38	1
39	2
40	1
41	40
42	1
43	42
44	1
45	44
46	1
47	46
48	1
49	48
50	1
51	10
52	1
53	52
54	1
55	18
56	1
57	28
58	1
59	58
60	1
61	60
62	1
63	2
64	1
65	16
66	1
67	66
68	1
69	4
70	1
71	70
72	1
73	72
74	1
75	2
76	1
77	4
78	1
79	78
80	1
81	80
82	1
83	82
84	1
85	84
86	1
87	2
88	1
89	88
90	1
91	90
92	1
93	92
94	1
95	2
96	1
97	96

n	a(n)
1	1
2	1
3	2
4	1
5	4
6	1
7	6
8	1
9	4
10	1
11	10
12	1
13	12
14	1
15	2
16	1
17	16
18	1
19	18
20	1
21	20
22	1
23	22
24	1
25	12
26	1
27	2
28	1
29	28
30	1
31	30
32	1
33	16
34	1
35	2
36	1
37	36
38	1
39	2
40	1
41	40
42	1
43	42
44	1
45	44
46	1
47	46
48	1
49	48
50	1
51	10
52	1
53	52
54	1
55	18
56	1
57	28
58	1
59	58
60	1
61	60
62	1
63	2
64	1
65	16
66	1
67	66
68	1
69	4
70	1
71	70
72	1
73	72
74	1
75	2
76	1
77	4
78	1
79	78
80	1
81	80
82	1
83	82
84	1
85	84
86	1
87	2
88	1
89	88
90	1
91	90
92	1
93	92
94	1
95	2
96	1
97	96