A340268 - cp's OEIS frontend

A340268 Composite numbers k>1 such that (s-1) | (d-1) for each d | k, where s = lpf(k) = A020639(k).

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	22
14	24
15	25
16	26
17	27
18	28
19	30
20	32
21	33
22	34
23	36
24	38
25	39
26	40
27	42
28	44
29	45
30	46
31	48
32	49
33	50
34	51
35	52
36	54
37	56
38	57
39	58
40	60
41	62
42	63
43	64
44	65
45	66
46	68
47	69
48	70
49	72
50	74
51	75
52	76
53	78
54	80
55	81
56	82
57	84
58	85
59	86
60	87
61	88
62	90
63	91
64	92
65	93
66	94
67	96

[4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 96]

cp's OEIS Frontend

A340268 Composite numbers k>1 such that (s-1) | (d-1) for each d | k, where s = lpf(k) = A020639(k).

Table of values

List of values

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	22
14	24
15	25
16	26
17	27
18	28
19	30
20	32
21	33
22	34
23	36
24	38
25	39
26	40
27	42
28	44
29	45
30	46
31	48
32	49
33	50
34	51
35	52
36	54
37	56
38	57
39	58
40	60
41	62
42	63
43	64
44	65
45	66
46	68
47	69
48	70
49	72
50	74
51	75
52	76
53	78
54	80
55	81
56	82
57	84
58	85
59	86
60	87
61	88
62	90
63	91
64	92
65	93
66	94
67	96

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	22
14	24
15	25
16	26
17	27
18	28
19	30
20	32
21	33
22	34
23	36
24	38
25	39
26	40
27	42
28	44
29	45
30	46
31	48
32	49
33	50
34	51
35	52
36	54
37	56
38	57
39	58
40	60
41	62
42	63
43	64
44	65
45	66
46	68
47	69
48	70
49	72
50	74
51	75
52	76
53	78
54	80
55	81
56	82
57	84
58	85
59	86
60	87
61	88
62	90
63	91
64	92
65	93
66	94
67	96

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	22
14	24
15	25
16	26
17	27
18	28
19	30
20	32
21	33
22	34
23	36
24	38
25	39
26	40
27	42
28	44
29	45
30	46
31	48
32	49
33	50
34	51
35	52
36	54
37	56
38	57
39	58
40	60
41	62
42	63
43	64
44	65
45	66
46	68
47	69
48	70
49	72
50	74
51	75
52	76
53	78
54	80
55	81
56	82
57	84
58	85
59	86
60	87
61	88
62	90
63	91
64	92
65	93
66	94
67	96