A174843 - cp's OEIS frontend

A174843 Irregular triangle in which row n lists the divisors of prime(n)-1.

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

[1, 1, 2, 1, 2, 4, 1, 2, 3, 6, 1, 2, 5, 10, 1, 2, 3, 4, 6, 12, 1, 2, 4, 8, 16, 1, 2, 3, 6, 9, 18, 1, 2, 11, 22, 1, 2, 4, 7, 14, 28, 1, 2, 3, 5, 6, 10, 15, 30, 1, 2, 3, 4, 6, 9, 12, 18, 36, 1, 2, 4, 5, 8, 10, 20, 40, 1, 2, 3, 6, 7, 14, 21, 42, 1, 2, 23, 46, 1, 2, 4, 13, 26, 52, 1, 2, 29, 58, 1, 2, 3, 4]

cp's OEIS Frontend

A174843 Irregular triangle in which row n lists the divisors of prime(n)-1.

Table of values

List of values

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

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

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