A357992 - cp's OEIS frontend

A357992 a(1)=1,a(2)=2,a(3)=3. Thereafter, if there are prime divisors p of a(n-2) which do not divide a(n-1), a(n) is the least novel multiple of any such p. Otherwise a(n) is the least novel multiple of the squarefree kernel of a(n-2).

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

[1, 2, 3, 4, 6, 8, 9, 10, 12, 5, 14, 15, 7, 18, 21, 16, 24, 20, 27, 22, 30, 11, 25, 33, 35, 36, 28, 39, 26, 42, 13, 32, 52, 34, 65, 17, 40, 51, 38, 45, 19, 48, 57, 44, 54, 55, 46, 50, 23, 56, 69, 49, 60, 63, 58, 66, 29, 62, 87, 31, 72, 93, 64, 75, 68, 70, 85, 74]

cp's OEIS Frontend

A357992 a(1)=1,a(2)=2,a(3)=3. Thereafter, if there are prime divisors p of a(n-2) which do not divide a(n-1), a(n) is the least novel multiple of any such p. Otherwise a(n) is the least novel multiple of the squarefree kernel of a(n-2).

Table of values

List of values

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

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

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