A111305 - cp's OEIS frontend

A111305 Composite numbers k such that a^(k-1) == 1 (mod k) only when a == 1 (mod k).

n	a(n)
1	4
2	6
3	8
4	10
5	12
6	14
7	16
8	18
9	20
10	22
11	24
12	26
13	30
14	32
15	34
16	36
17	38
18	40
19	42
20	44
21	46
22	48
23	50
24	54
25	56
26	58
27	60
28	62
29	64
30	68
31	72
32	74
33	78
34	80
35	82
36	84
37	86
38	88
39	90
40	92
41	94
42	96
43	98
44	100
45	102
46	104
47	106
48	108
49	110
50	114
51	116
52	118
53	120
54	122
55	126
56	128
57	132
58	134
59	136
60	138
61	140
62	142
63	144

[4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 54, 56, 58, 60, 62, 64, 68, 72, 74, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 114, 116, 118, 120, 122, 126, 128, 132, 134, 136, 138, 140, 142, 144]

cp's OEIS Frontend

A111305 Composite numbers k such that a^(k-1) == 1 (mod k) only when a == 1 (mod k).

Table of values

List of values

n	a(n)
1	4
2	6
3	8
4	10
5	12
6	14
7	16
8	18
9	20
10	22
11	24
12	26
13	30
14	32
15	34
16	36
17	38
18	40
19	42
20	44
21	46
22	48
23	50
24	54
25	56
26	58
27	60
28	62
29	64
30	68
31	72
32	74
33	78
34	80
35	82
36	84
37	86
38	88
39	90
40	92
41	94
42	96
43	98
44	100
45	102
46	104
47	106
48	108
49	110
50	114
51	116
52	118
53	120
54	122
55	126
56	128
57	132
58	134
59	136
60	138
61	140
62	142
63	144

n	a(n)
1	4
2	6
3	8
4	10
5	12
6	14
7	16
8	18
9	20
10	22
11	24
12	26
13	30
14	32
15	34
16	36
17	38
18	40
19	42
20	44
21	46
22	48
23	50
24	54
25	56
26	58
27	60
28	62
29	64
30	68
31	72
32	74
33	78
34	80
35	82
36	84
37	86
38	88
39	90
40	92
41	94
42	96
43	98
44	100
45	102
46	104
47	106
48	108
49	110
50	114
51	116
52	118
53	120
54	122
55	126
56	128
57	132
58	134
59	136
60	138
61	140
62	142
63	144

n	a(n)
1	4
2	6
3	8
4	10
5	12
6	14
7	16
8	18
9	20
10	22
11	24
12	26
13	30
14	32
15	34
16	36
17	38
18	40
19	42
20	44
21	46
22	48
23	50
24	54
25	56
26	58
27	60
28	62
29	64
30	68
31	72
32	74
33	78
34	80
35	82
36	84
37	86
38	88
39	90
40	92
41	94
42	96
43	98
44	100
45	102
46	104
47	106
48	108
49	110
50	114
51	116
52	118
53	120
54	122
55	126
56	128
57	132
58	134
59	136
60	138
61	140
62	142
63	144