A236465 - cp's OEIS frontend

A236465 Smallest prime a(n) such that 1 + a(1)a(2)...*a(n) is prime.

n	a(n)
1	2
2	2
3	3
4	3
5	2
6	13
7	2
8	11
9	19
10	2
11	2
12	5
13	11
14	2
15	31
16	53
17	3
18	31
19	43
20	19
21	13
22	11
23	43
24	23
25	7
26	5
27	13
28	5
29	29
30	2
31	29
32	17
33	53
34	157
35	13
36	13
37	3
38	5
39	127
40	7
41	97
42	5
43	97
44	2
45	89
46	61
47	7
48	71
49	61
50	5
51	127
52	113
53	37
54	191
55	107
56	17
57	197
58	37
59	101
60	2
61	5
62	7
63	17
64	457
65	3
66	19
67	29
68	103
69	227

[2, 2, 3, 3, 2, 13, 2, 11, 19, 2, 2, 5, 11, 2, 31, 53, 3, 31, 43, 19, 13, 11, 43, 23, 7, 5, 13, 5, 29, 2, 29, 17, 53, 157, 13, 13, 3, 5, 127, 7, 97, 5, 97, 2, 89, 61, 7, 71, 61, 5, 127, 113, 37, 191, 107, 17, 197, 37, 101, 2, 5, 7, 17, 457, 3, 19, 29, 103, 227]

cp's OEIS Frontend

A236465 Smallest prime a(n) such that 1 + a(1)a(2)...*a(n) is prime.

Table of values

List of values

n	a(n)
1	2
2	2
3	3
4	3
5	2
6	13
7	2
8	11
9	19
10	2
11	2
12	5
13	11
14	2
15	31
16	53
17	3
18	31
19	43
20	19
21	13
22	11
23	43
24	23
25	7
26	5
27	13
28	5
29	29
30	2
31	29
32	17
33	53
34	157
35	13
36	13
37	3
38	5
39	127
40	7
41	97
42	5
43	97
44	2
45	89
46	61
47	7
48	71
49	61
50	5
51	127
52	113
53	37
54	191
55	107
56	17
57	197
58	37
59	101
60	2
61	5
62	7
63	17
64	457
65	3
66	19
67	29
68	103
69	227

n	a(n)
1	2
2	2
3	3
4	3
5	2
6	13
7	2
8	11
9	19
10	2
11	2
12	5
13	11
14	2
15	31
16	53
17	3
18	31
19	43
20	19
21	13
22	11
23	43
24	23
25	7
26	5
27	13
28	5
29	29
30	2
31	29
32	17
33	53
34	157
35	13
36	13
37	3
38	5
39	127
40	7
41	97
42	5
43	97
44	2
45	89
46	61
47	7
48	71
49	61
50	5
51	127
52	113
53	37
54	191
55	107
56	17
57	197
58	37
59	101
60	2
61	5
62	7
63	17
64	457
65	3
66	19
67	29
68	103
69	227

cp's OEIS Frontend

A236465 Smallest prime a(n) such that 1 + a(1)*a(2)*...*a(n) is prime.

Table of values

List of values

A236465 Smallest prime a(n) such that 1 + a(1)a(2)...*a(n) is prime.

n	a(n)
1	2
2	2
3	3
4	3
5	2
6	13
7	2
8	11
9	19
10	2
11	2
12	5
13	11
14	2
15	31
16	53
17	3
18	31
19	43
20	19
21	13
22	11
23	43
24	23
25	7
26	5
27	13
28	5
29	29
30	2
31	29
32	17
33	53
34	157
35	13
36	13
37	3
38	5
39	127
40	7
41	97
42	5
43	97
44	2
45	89
46	61
47	7
48	71
49	61
50	5
51	127
52	113
53	37
54	191
55	107
56	17
57	197
58	37
59	101
60	2
61	5
62	7
63	17
64	457
65	3
66	19
67	29
68	103
69	227