A369272 - cp's OEIS frontend

A369272 a(1) = 1; for n > 1, a(n) is the smallest positive number that has not yet appeared that is a multiple of the smallest prime that does not divide n*a(n-1).

n	a(n)
1	1
2	3
3	2
4	6
5	7
6	5
7	4
8	9
9	8
10	12
11	10
12	14
13	15
14	11
15	16
16	18
17	20
18	21
19	22
20	24
21	25
22	27
23	26
24	30
25	28
26	33
27	32
28	36
29	35
30	44
31	39
32	40
33	42
34	45
35	34
36	50
37	48
38	55
39	38
40	51
41	46
42	60
43	49
44	54
45	56
46	57
47	52
48	65
49	58
50	63
51	62
52	66
53	70
54	77
55	64
56	69
57	68
58	72
59	75
60	84
61	80
62	78
63	85
64	81
65	74
66	90
67	91
68	87
69	76
70	93
71	82
72	95
73	86
74	96
75	98
76	99

[1, 3, 2, 6, 7, 5, 4, 9, 8, 12, 10, 14, 15, 11, 16, 18, 20, 21, 22, 24, 25, 27, 26, 30, 28, 33, 32, 36, 35, 44, 39, 40, 42, 45, 34, 50, 48, 55, 38, 51, 46, 60, 49, 54, 56, 57, 52, 65, 58, 63, 62, 66, 70, 77, 64, 69, 68, 72, 75, 84, 80, 78, 85, 81, 74, 90, 91, 87, 76, 93, 82, 95, 86, 96, 98, 99]

cp's OEIS Frontend

A369272 a(1) = 1; for n > 1, a(n) is the smallest positive number that has not yet appeared that is a multiple of the smallest prime that does not divide n*a(n-1).

Table of values

List of values

n	a(n)
1	1
2	3
3	2
4	6
5	7
6	5
7	4
8	9
9	8
10	12
11	10
12	14
13	15
14	11
15	16
16	18
17	20
18	21
19	22
20	24
21	25
22	27
23	26
24	30
25	28
26	33
27	32
28	36
29	35
30	44
31	39
32	40
33	42
34	45
35	34
36	50
37	48
38	55
39	38
40	51
41	46
42	60
43	49
44	54
45	56
46	57
47	52
48	65
49	58
50	63
51	62
52	66
53	70
54	77
55	64
56	69
57	68
58	72
59	75
60	84
61	80
62	78
63	85
64	81
65	74
66	90
67	91
68	87
69	76
70	93
71	82
72	95
73	86
74	96
75	98
76	99

n	a(n)
1	1
2	3
3	2
4	6
5	7
6	5
7	4
8	9
9	8
10	12
11	10
12	14
13	15
14	11
15	16
16	18
17	20
18	21
19	22
20	24
21	25
22	27
23	26
24	30
25	28
26	33
27	32
28	36
29	35
30	44
31	39
32	40
33	42
34	45
35	34
36	50
37	48
38	55
39	38
40	51
41	46
42	60
43	49
44	54
45	56
46	57
47	52
48	65
49	58
50	63
51	62
52	66
53	70
54	77
55	64
56	69
57	68
58	72
59	75
60	84
61	80
62	78
63	85
64	81
65	74
66	90
67	91
68	87
69	76
70	93
71	82
72	95
73	86
74	96
75	98
76	99

n	a(n)
1	1
2	3
3	2
4	6
5	7
6	5
7	4
8	9
9	8
10	12
11	10
12	14
13	15
14	11
15	16
16	18
17	20
18	21
19	22
20	24
21	25
22	27
23	26
24	30
25	28
26	33
27	32
28	36
29	35
30	44
31	39
32	40
33	42
34	45
35	34
36	50
37	48
38	55
39	38
40	51
41	46
42	60
43	49
44	54
45	56
46	57
47	52
48	65
49	58
50	63
51	62
52	66
53	70
54	77
55	64
56	69
57	68
58	72
59	75
60	84
61	80
62	78
63	85
64	81
65	74
66	90
67	91
68	87
69	76
70	93
71	82
72	95
73	86
74	96
75	98
76	99