A109289 - cp's OEIS frontend

A109289 Composite numbers which are not of the form p*q + 1, where p and q are distinct primes.

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	18
9	20
10	21
11	24
12	25
13	26
14	28
15	30
16	32
17	33
18	38
19	42
20	44
21	45
22	46
23	48
24	49
25	50
26	51
27	54
28	55
29	57
30	60
31	62
32	64
33	65
34	68
35	69
36	72
37	74
38	76
39	77
40	80
41	81
42	82
43	84
44	85
45	90
46	91
47	93
48	98
49	99
50	100
51	102
52	104
53	105
54	106
55	108
56	110
57	111
58	114
59	115
60	117
61	118
62	121
63	122
64	125
65	126
66	128

[4, 6, 8, 9, 10, 12, 14, 18, 20, 21, 24, 25, 26, 28, 30, 32, 33, 38, 42, 44, 45, 46, 48, 49, 50, 51, 54, 55, 57, 60, 62, 64, 65, 68, 69, 72, 74, 76, 77, 80, 81, 82, 84, 85, 90, 91, 93, 98, 99, 100, 102, 104, 105, 106, 108, 110, 111, 114, 115, 117, 118, 121, 122, 125, 126, 128]

cp's OEIS Frontend

A109289 Composite numbers which are not of the form p*q + 1, where p and q are distinct primes.

Table of values

List of values

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	18
9	20
10	21
11	24
12	25
13	26
14	28
15	30
16	32
17	33
18	38
19	42
20	44
21	45
22	46
23	48
24	49
25	50
26	51
27	54
28	55
29	57
30	60
31	62
32	64
33	65
34	68
35	69
36	72
37	74
38	76
39	77
40	80
41	81
42	82
43	84
44	85
45	90
46	91
47	93
48	98
49	99
50	100
51	102
52	104
53	105
54	106
55	108
56	110
57	111
58	114
59	115
60	117
61	118
62	121
63	122
64	125
65	126
66	128

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	18
9	20
10	21
11	24
12	25
13	26
14	28
15	30
16	32
17	33
18	38
19	42
20	44
21	45
22	46
23	48
24	49
25	50
26	51
27	54
28	55
29	57
30	60
31	62
32	64
33	65
34	68
35	69
36	72
37	74
38	76
39	77
40	80
41	81
42	82
43	84
44	85
45	90
46	91
47	93
48	98
49	99
50	100
51	102
52	104
53	105
54	106
55	108
56	110
57	111
58	114
59	115
60	117
61	118
62	121
63	122
64	125
65	126
66	128

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	18
9	20
10	21
11	24
12	25
13	26
14	28
15	30
16	32
17	33
18	38
19	42
20	44
21	45
22	46
23	48
24	49
25	50
26	51
27	54
28	55
29	57
30	60
31	62
32	64
33	65
34	68
35	69
36	72
37	74
38	76
39	77
40	80
41	81
42	82
43	84
44	85
45	90
46	91
47	93
48	98
49	99
50	100
51	102
52	104
53	105
54	106
55	108
56	110
57	111
58	114
59	115
60	117
61	118
62	121
63	122
64	125
65	126
66	128