A363274 - cp's OEIS frontend

A363274 a(n) is the smallest prime such that a(1)a(2)...*a(n) +/- 1 is prime.

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

[2, 2, 2, 2, 2, 3, 2, 2, 2, 11, 3, 3, 2, 2, 5, 2, 2, 3, 3, 5, 2, 2, 5, 2, 2, 7, 3, 3, 2, 2, 23, 47, 2, 2, 2, 29, 2, 53, 13, 5, 17, 29, 5, 3, 3, 3, 5, 17, 2, 3, 3, 79, 31, 11, 7, 23, 2, 7, 3, 7, 2, 13, 5, 7, 5, 7, 23, 17, 23, 13, 31, 29, 7, 67, 47, 7, 2, 23, 13, 23, 23, 31, 73, 13, 23, 3, 17]

cp's OEIS Frontend

A363274 a(n) is the smallest prime such that a(1)a(2)...*a(n) +/- 1 is prime.

Table of values

List of values

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

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

cp's OEIS Frontend

A363274 a(n) is the smallest prime such that a(1)*a(2)*...*a(n) +/- 1 is prime.

Table of values

List of values

A363274 a(n) is the smallest prime such that a(1)a(2)...*a(n) +/- 1 is prime.

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