A226040 - cp's OEIS frontend

A226040 a(n) = product{ p prime such that p divides n + 1 and p - 1 does not divide n }.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	1
9	5
10	1
11	3
12	1
13	7
14	5
15	1
16	1
17	3
18	1
19	5
20	7
21	11
22	1
23	3
24	1
25	13
26	1
27	7
28	1
29	15
30	1
31	1
32	11
33	17
34	35
35	3
36	1
37	19
38	13
39	5
40	1
41	21
42	1
43	11
44	1
45	23
46	1
47	3
48	1
49	5
50	17
51	13
52	1
53	3
54	55
55	7
56	19
57	29
58	1
59	15
60	1
61	31
62	7
63	1
64	13
65	33
66	1
67	17
68	23
69	35
70	1
71	3
72	1
73	37
74	5
75	19
76	77
77	39

[1, 1, 1, 1, 1, 3, 1, 1, 1, 5, 1, 3, 1, 7, 5, 1, 1, 3, 1, 5, 7, 11, 1, 3, 1, 13, 1, 7, 1, 15, 1, 1, 11, 17, 35, 3, 1, 19, 13, 5, 1, 21, 1, 11, 1, 23, 1, 3, 1, 5, 17, 13, 1, 3, 55, 7, 19, 29, 1, 15, 1, 31, 7, 1, 13, 33, 1, 17, 23, 35, 1, 3, 1, 37, 5, 19, 77, 39]

cp's OEIS Frontend

A226040 a(n) = product{ p prime such that p divides n + 1 and p - 1 does not divide n }.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	1
9	5
10	1
11	3
12	1
13	7
14	5
15	1
16	1
17	3
18	1
19	5
20	7
21	11
22	1
23	3
24	1
25	13
26	1
27	7
28	1
29	15
30	1
31	1
32	11
33	17
34	35
35	3
36	1
37	19
38	13
39	5
40	1
41	21
42	1
43	11
44	1
45	23
46	1
47	3
48	1
49	5
50	17
51	13
52	1
53	3
54	55
55	7
56	19
57	29
58	1
59	15
60	1
61	31
62	7
63	1
64	13
65	33
66	1
67	17
68	23
69	35
70	1
71	3
72	1
73	37
74	5
75	19
76	77
77	39

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	1
9	5
10	1
11	3
12	1
13	7
14	5
15	1
16	1
17	3
18	1
19	5
20	7
21	11
22	1
23	3
24	1
25	13
26	1
27	7
28	1
29	15
30	1
31	1
32	11
33	17
34	35
35	3
36	1
37	19
38	13
39	5
40	1
41	21
42	1
43	11
44	1
45	23
46	1
47	3
48	1
49	5
50	17
51	13
52	1
53	3
54	55
55	7
56	19
57	29
58	1
59	15
60	1
61	31
62	7
63	1
64	13
65	33
66	1
67	17
68	23
69	35
70	1
71	3
72	1
73	37
74	5
75	19
76	77
77	39

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	1
9	5
10	1
11	3
12	1
13	7
14	5
15	1
16	1
17	3
18	1
19	5
20	7
21	11
22	1
23	3
24	1
25	13
26	1
27	7
28	1
29	15
30	1
31	1
32	11
33	17
34	35
35	3
36	1
37	19
38	13
39	5
40	1
41	21
42	1
43	11
44	1
45	23
46	1
47	3
48	1
49	5
50	17
51	13
52	1
53	3
54	55
55	7
56	19
57	29
58	1
59	15
60	1
61	31
62	7
63	1
64	13
65	33
66	1
67	17
68	23
69	35
70	1
71	3
72	1
73	37
74	5
75	19
76	77
77	39