A051957 - cp's OEIS frontend

A051957 a(n) = smallest number > a(n-1) such that a(1)a(2)...*a(n) - 1 is a prime.

n	a(n)
1	3
2	4
3	5
4	6
5	8
6	9
7	11
8	14
9	18
10	20
11	21
12	27
13	28
14	37
15	62
16	77
17	86
18	97
19	100
20	107
21	109
22	166
23	167
24	181
25	196
26	225
27	262
28	266
29	268
30	274
31	278
32	290
33	305
34	345
35	378
36	385
37	414
38	429
39	438
40	442
41	498
42	503
43	516
44	531
45	573
46	595
47	596
48	611
49	640
50	665
51	749
52	794
53	870

[3, 4, 5, 6, 8, 9, 11, 14, 18, 20, 21, 27, 28, 37, 62, 77, 86, 97, 100, 107, 109, 166, 167, 181, 196, 225, 262, 266, 268, 274, 278, 290, 305, 345, 378, 385, 414, 429, 438, 442, 498, 503, 516, 531, 573, 595, 596, 611, 640, 665, 749, 794, 870]

cp's OEIS Frontend

A051957 a(n) = smallest number > a(n-1) such that a(1)a(2)...*a(n) - 1 is a prime.

Table of values

List of values

n	a(n)
1	3
2	4
3	5
4	6
5	8
6	9
7	11
8	14
9	18
10	20
11	21
12	27
13	28
14	37
15	62
16	77
17	86
18	97
19	100
20	107
21	109
22	166
23	167
24	181
25	196
26	225
27	262
28	266
29	268
30	274
31	278
32	290
33	305
34	345
35	378
36	385
37	414
38	429
39	438
40	442
41	498
42	503
43	516
44	531
45	573
46	595
47	596
48	611
49	640
50	665
51	749
52	794
53	870

n	a(n)
1	3
2	4
3	5
4	6
5	8
6	9
7	11
8	14
9	18
10	20
11	21
12	27
13	28
14	37
15	62
16	77
17	86
18	97
19	100
20	107
21	109
22	166
23	167
24	181
25	196
26	225
27	262
28	266
29	268
30	274
31	278
32	290
33	305
34	345
35	378
36	385
37	414
38	429
39	438
40	442
41	498
42	503
43	516
44	531
45	573
46	595
47	596
48	611
49	640
50	665
51	749
52	794
53	870

cp's OEIS Frontend

A051957 a(n) = smallest number > a(n-1) such that a(1)*a(2)*...*a(n) - 1 is a prime.

Table of values

List of values

A051957 a(n) = smallest number > a(n-1) such that a(1)a(2)...*a(n) - 1 is a prime.

n	a(n)
1	3
2	4
3	5
4	6
5	8
6	9
7	11
8	14
9	18
10	20
11	21
12	27
13	28
14	37
15	62
16	77
17	86
18	97
19	100
20	107
21	109
22	166
23	167
24	181
25	196
26	225
27	262
28	266
29	268
30	274
31	278
32	290
33	305
34	345
35	378
36	385
37	414
38	429
39	438
40	442
41	498
42	503
43	516
44	531
45	573
46	595
47	596
48	611
49	640
50	665
51	749
52	794
53	870