A177103 - cp's OEIS frontend

A177103 Numbers n >= 0 such that 2*3^n - 1 is not prime.

n	a(n)
1	0
2	4
3	5
4	6
5	9
6	10
7	11
8	13
9	14
10	15
11	16
12	17
13	18
14	19
15	21
16	22
17	24
18	25
19	26
20	28
21	29
22	30
23	31
24	32
25	33
26	34
27	36
28	37
29	38
30	39
31	40
32	41
33	42
34	43
35	44
36	45
37	46
38	47
39	48
40	49
41	50
42	51
43	52
44	53
45	54
46	55
47	57
48	58
49	59
50	60
51	61
52	63
53	64
54	65
55	66
56	67
57	69
58	70
59	71
60	72
61	73
62	74
63	75
64	76
65	77
66	78
67	79
68	80
69	81
70	82
71	83
72	84

[0, 4, 5, 6, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24, 25, 26, 28, 29, 30, 31, 32, 33, 34, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 57, 58, 59, 60, 61, 63, 64, 65, 66, 67, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84]

cp's OEIS Frontend

A177103 Numbers n >= 0 such that 2*3^n - 1 is not prime.

Table of values

List of values

n	a(n)
1	0
2	4
3	5
4	6
5	9
6	10
7	11
8	13
9	14
10	15
11	16
12	17
13	18
14	19
15	21
16	22
17	24
18	25
19	26
20	28
21	29
22	30
23	31
24	32
25	33
26	34
27	36
28	37
29	38
30	39
31	40
32	41
33	42
34	43
35	44
36	45
37	46
38	47
39	48
40	49
41	50
42	51
43	52
44	53
45	54
46	55
47	57
48	58
49	59
50	60
51	61
52	63
53	64
54	65
55	66
56	67
57	69
58	70
59	71
60	72
61	73
62	74
63	75
64	76
65	77
66	78
67	79
68	80
69	81
70	82
71	83
72	84

n	a(n)
1	0
2	4
3	5
4	6
5	9
6	10
7	11
8	13
9	14
10	15
11	16
12	17
13	18
14	19
15	21
16	22
17	24
18	25
19	26
20	28
21	29
22	30
23	31
24	32
25	33
26	34
27	36
28	37
29	38
30	39
31	40
32	41
33	42
34	43
35	44
36	45
37	46
38	47
39	48
40	49
41	50
42	51
43	52
44	53
45	54
46	55
47	57
48	58
49	59
50	60
51	61
52	63
53	64
54	65
55	66
56	67
57	69
58	70
59	71
60	72
61	73
62	74
63	75
64	76
65	77
66	78
67	79
68	80
69	81
70	82
71	83
72	84

n	a(n)
1	0
2	4
3	5
4	6
5	9
6	10
7	11
8	13
9	14
10	15
11	16
12	17
13	18
14	19
15	21
16	22
17	24
18	25
19	26
20	28
21	29
22	30
23	31
24	32
25	33
26	34
27	36
28	37
29	38
30	39
31	40
32	41
33	42
34	43
35	44
36	45
37	46
38	47
39	48
40	49
41	50
42	51
43	52
44	53
45	54
46	55
47	57
48	58
49	59
50	60
51	61
52	63
53	64
54	65
55	66
56	67
57	69
58	70
59	71
60	72
61	73
62	74
63	75
64	76
65	77
66	78
67	79
68	80
69	81
70	82
71	83
72	84