A083769 - cp's OEIS frontend

A083769 a(1)=2; for n >= 2, a(n) = smallest even number such that a(1)a(2)...*a(n) + 1 is prime.

n	a(n)
1	2
2	6
3	8
4	12
5	16
6	10
7	4
8	30
9	26
10	22
11	24
12	14
13	50
14	42
15	18
16	64
17	46
18	60
19	32
20	36
21	20
22	34
23	28
24	108
25	48
26	44
27	68
28	282
29	90
30	54
31	76
32	62
33	180
34	66
35	132
36	86
37	74
38	38
39	58
40	106
41	120
42	52
43	244
44	94
45	100
46	82
47	138
48	156
49	98
50	72
51	172
52	150
53	248
54	154
55	166
56	114
57	162
58	126
59	124
60	208
61	222
62	324
63	212

[2, 6, 8, 12, 16, 10, 4, 30, 26, 22, 24, 14, 50, 42, 18, 64, 46, 60, 32, 36, 20, 34, 28, 108, 48, 44, 68, 282, 90, 54, 76, 62, 180, 66, 132, 86, 74, 38, 58, 106, 120, 52, 244, 94, 100, 82, 138, 156, 98, 72, 172, 150, 248, 154, 166, 114, 162, 126, 124, 208, 222, 324, 212]

cp's OEIS Frontend

A083769 a(1)=2; for n >= 2, a(n) = smallest even number such that a(1)a(2)...*a(n) + 1 is prime.

Table of values

List of values

n	a(n)
1	2
2	6
3	8
4	12
5	16
6	10
7	4
8	30
9	26
10	22
11	24
12	14
13	50
14	42
15	18
16	64
17	46
18	60
19	32
20	36
21	20
22	34
23	28
24	108
25	48
26	44
27	68
28	282
29	90
30	54
31	76
32	62
33	180
34	66
35	132
36	86
37	74
38	38
39	58
40	106
41	120
42	52
43	244
44	94
45	100
46	82
47	138
48	156
49	98
50	72
51	172
52	150
53	248
54	154
55	166
56	114
57	162
58	126
59	124
60	208
61	222
62	324
63	212

n	a(n)
1	2
2	6
3	8
4	12
5	16
6	10
7	4
8	30
9	26
10	22
11	24
12	14
13	50
14	42
15	18
16	64
17	46
18	60
19	32
20	36
21	20
22	34
23	28
24	108
25	48
26	44
27	68
28	282
29	90
30	54
31	76
32	62
33	180
34	66
35	132
36	86
37	74
38	38
39	58
40	106
41	120
42	52
43	244
44	94
45	100
46	82
47	138
48	156
49	98
50	72
51	172
52	150
53	248
54	154
55	166
56	114
57	162
58	126
59	124
60	208
61	222
62	324
63	212

cp's OEIS Frontend

A083769 a(1)=2; for n >= 2, a(n) = smallest even number such that a(1)*a(2)*...*a(n) + 1 is prime.

Table of values

List of values

A083769 a(1)=2; for n >= 2, a(n) = smallest even number such that a(1)a(2)...*a(n) + 1 is prime.

n	a(n)
1	2
2	6
3	8
4	12
5	16
6	10
7	4
8	30
9	26
10	22
11	24
12	14
13	50
14	42
15	18
16	64
17	46
18	60
19	32
20	36
21	20
22	34
23	28
24	108
25	48
26	44
27	68
28	282
29	90
30	54
31	76
32	62
33	180
34	66
35	132
36	86
37	74
38	38
39	58
40	106
41	120
42	52
43	244
44	94
45	100
46	82
47	138
48	156
49	98
50	72
51	172
52	150
53	248
54	154
55	166
56	114
57	162
58	126
59	124
60	208
61	222
62	324
63	212