A337182 - cp's OEIS frontend

A337182 a(1) = 1, a(2) = 2; for n>2, a(n) is the smallest number not already used which is a multiple of the product of the most frequently occurring distinct prime factors in a(n-1).

n	a(n)
1	1
2	2
3	4
4	6
5	12
6	8
7	10
8	20
9	14
10	28
11	16
12	18
13	3
14	9
15	15
16	30
17	60
18	22
19	44
20	24
21	26
22	52
23	32
24	34
25	68
26	36
27	42
28	84
29	38
30	76
31	40
32	46
33	92
34	48
35	50
36	5
37	25
38	35
39	70
40	140
41	54
42	21
43	63
44	27
45	33
46	66
47	132
48	56
49	58
50	116
51	62
52	124
53	64
54	72
55	74
56	148
57	78
58	156
59	80
60	82
61	164
62	86
63	172
64	88
65	90
66	39
67	117
68	45
69	51
70	102
71	204

[1, 2, 4, 6, 12, 8, 10, 20, 14, 28, 16, 18, 3, 9, 15, 30, 60, 22, 44, 24, 26, 52, 32, 34, 68, 36, 42, 84, 38, 76, 40, 46, 92, 48, 50, 5, 25, 35, 70, 140, 54, 21, 63, 27, 33, 66, 132, 56, 58, 116, 62, 124, 64, 72, 74, 148, 78, 156, 80, 82, 164, 86, 172, 88, 90, 39, 117, 45, 51, 102, 204]

cp's OEIS Frontend

A337182 a(1) = 1, a(2) = 2; for n>2, a(n) is the smallest number not already used which is a multiple of the product of the most frequently occurring distinct prime factors in a(n-1).

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	6
5	12
6	8
7	10
8	20
9	14
10	28
11	16
12	18
13	3
14	9
15	15
16	30
17	60
18	22
19	44
20	24
21	26
22	52
23	32
24	34
25	68
26	36
27	42
28	84
29	38
30	76
31	40
32	46
33	92
34	48
35	50
36	5
37	25
38	35
39	70
40	140
41	54
42	21
43	63
44	27
45	33
46	66
47	132
48	56
49	58
50	116
51	62
52	124
53	64
54	72
55	74
56	148
57	78
58	156
59	80
60	82
61	164
62	86
63	172
64	88
65	90
66	39
67	117
68	45
69	51
70	102
71	204

n	a(n)
1	1
2	2
3	4
4	6
5	12
6	8
7	10
8	20
9	14
10	28
11	16
12	18
13	3
14	9
15	15
16	30
17	60
18	22
19	44
20	24
21	26
22	52
23	32
24	34
25	68
26	36
27	42
28	84
29	38
30	76
31	40
32	46
33	92
34	48
35	50
36	5
37	25
38	35
39	70
40	140
41	54
42	21
43	63
44	27
45	33
46	66
47	132
48	56
49	58
50	116
51	62
52	124
53	64
54	72
55	74
56	148
57	78
58	156
59	80
60	82
61	164
62	86
63	172
64	88
65	90
66	39
67	117
68	45
69	51
70	102
71	204

n	a(n)
1	1
2	2
3	4
4	6
5	12
6	8
7	10
8	20
9	14
10	28
11	16
12	18
13	3
14	9
15	15
16	30
17	60
18	22
19	44
20	24
21	26
22	52
23	32
24	34
25	68
26	36
27	42
28	84
29	38
30	76
31	40
32	46
33	92
34	48
35	50
36	5
37	25
38	35
39	70
40	140
41	54
42	21
43	63
44	27
45	33
46	66
47	132
48	56
49	58
50	116
51	62
52	124
53	64
54	72
55	74
56	148
57	78
58	156
59	80
60	82
61	164
62	86
63	172
64	88
65	90
66	39
67	117
68	45
69	51
70	102
71	204