A108939 - cp's OEIS frontend

A108939 Triangle read by rows in which row n lists all primes p such that p-1|n.

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

[2, 2, 3, 2, 2, 3, 5, 2, 2, 3, 7, 2, 2, 3, 5, 2, 2, 3, 11, 2, 2, 3, 5, 7, 13, 2, 2, 3, 2, 2, 3, 5, 17, 2, 2, 3, 7, 19, 2, 2, 3, 5, 11, 2, 2, 3, 23, 2, 2, 3, 5, 7, 13, 2, 2, 3, 2, 2, 3, 5, 29, 2, 2, 3, 7, 11, 31, 2, 2, 3, 5, 17, 2, 2, 3, 2, 2, 3, 5, 7, 13, 19, 37, 2, 2, 3, 2, 2, 3, 5, 11, 41, 2]

cp's OEIS Frontend

A108939 Triangle read by rows in which row n lists all primes p such that p-1|n.

Table of values

List of values

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

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

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