A362015 - cp's OEIS frontend

A362015 a(1) = 1, a(2) = 2; for n > 2, a(n) is the smallest positive number that has not yet appeared that, given the list of primes that form the factors of all previous terms a(1)..a(n-1), is a multiple of the prime in that list which is a factor of the fewest previous terms. If two or more such primes exist the smallest is chosen.

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	8
8	12
9	15
10	5
11	10
12	20
13	25
14	18
15	30
16	35
17	7
18	14
19	21
20	28
21	42
22	49
23	40
24	56
25	45
26	63
27	50
28	70
29	77
30	11
31	22
32	33
33	44
34	55
35	66
36	88
37	99
38	110
39	121
40	84
41	132
42	91
43	13
44	26
45	39
46	52
47	65
48	78
49	104
50	117
51	130
52	143
53	156
54	169
55	98
56	154
57	182
58	165
59	195
60	176
61	208
62	105
63	187
64	17
65	34
66	51
67	68
68	85
69	102
70	119
71	136

[1, 2, 4, 6, 3, 9, 8, 12, 15, 5, 10, 20, 25, 18, 30, 35, 7, 14, 21, 28, 42, 49, 40, 56, 45, 63, 50, 70, 77, 11, 22, 33, 44, 55, 66, 88, 99, 110, 121, 84, 132, 91, 13, 26, 39, 52, 65, 78, 104, 117, 130, 143, 156, 169, 98, 154, 182, 165, 195, 176, 208, 105, 187, 17, 34, 51, 68, 85, 102, 119, 136]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	8
8	12
9	15
10	5
11	10
12	20
13	25
14	18
15	30
16	35
17	7
18	14
19	21
20	28
21	42
22	49
23	40
24	56
25	45
26	63
27	50
28	70
29	77
30	11
31	22
32	33
33	44
34	55
35	66
36	88
37	99
38	110
39	121
40	84
41	132
42	91
43	13
44	26
45	39
46	52
47	65
48	78
49	104
50	117
51	130
52	143
53	156
54	169
55	98
56	154
57	182
58	165
59	195
60	176
61	208
62	105
63	187
64	17
65	34
66	51
67	68
68	85
69	102
70	119
71	136

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	8
8	12
9	15
10	5
11	10
12	20
13	25
14	18
15	30
16	35
17	7
18	14
19	21
20	28
21	42
22	49
23	40
24	56
25	45
26	63
27	50
28	70
29	77
30	11
31	22
32	33
33	44
34	55
35	66
36	88
37	99
38	110
39	121
40	84
41	132
42	91
43	13
44	26
45	39
46	52
47	65
48	78
49	104
50	117
51	130
52	143
53	156
54	169
55	98
56	154
57	182
58	165
59	195
60	176
61	208
62	105
63	187
64	17
65	34
66	51
67	68
68	85
69	102
70	119
71	136

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	8
8	12
9	15
10	5
11	10
12	20
13	25
14	18
15	30
16	35
17	7
18	14
19	21
20	28
21	42
22	49
23	40
24	56
25	45
26	63
27	50
28	70
29	77
30	11
31	22
32	33
33	44
34	55
35	66
36	88
37	99
38	110
39	121
40	84
41	132
42	91
43	13
44	26
45	39
46	52
47	65
48	78
49	104
50	117
51	130
52	143
53	156
54	169
55	98
56	154
57	182
58	165
59	195
60	176
61	208
62	105
63	187
64	17
65	34
66	51
67	68
68	85
69	102
70	119
71	136