A164701 - cp's OEIS frontend

A164701 a(n) = the smallest positive integer such that neither a(n) nor a(n)+1 are coprime to A024619(n), where A024619 is the sequence of positive integers that are not powers of primes.

n	a(n)
1	2
2	4
3	2
4	6
5	5
6	2
7	4
8	6
9	10
10	2
11	12
12	6
13	2
14	11
15	16
16	14
17	2
18	18
19	12
20	4
21	2
22	10
23	5
24	22
25	2
26	4
27	17
28	12
29	2
30	10
31	6
32	18
33	28
34	2
35	30
36	6
37	25
38	2
39	16
40	23
41	4
42	2
43	36
44	5
45	18
46	21
47	2
48	4
49	40
50	2
51	34
52	42
53	29
54	10
55	2
56	13
57	22
58	30
59	46
60	19
61	2
62	6
63	11
64	4
65	2
66	12
67	5
68	52
69	2
70	4
71	36
72	6
73	2
74	45
75	28
76	12
77	58
78	34
79	2
80	60
81	41
82	30
83	2

[2, 4, 2, 6, 5, 2, 4, 6, 10, 2, 12, 6, 2, 11, 16, 14, 2, 18, 12, 4, 2, 10, 5, 22, 2, 4, 17, 12, 2, 10, 6, 18, 28, 2, 30, 6, 25, 2, 16, 23, 4, 2, 36, 5, 18, 21, 2, 4, 40, 2, 34, 42, 29, 10, 2, 13, 22, 30, 46, 19, 2, 6, 11, 4, 2, 12, 5, 52, 2, 4, 36, 6, 2, 45, 28, 12, 58, 34, 2, 60, 41, 30, 2]

cp's OEIS Frontend

A164701 a(n) = the smallest positive integer such that neither a(n) nor a(n)+1 are coprime to A024619(n), where A024619 is the sequence of positive integers that are not powers of primes.

Table of values

List of values

n	a(n)
1	2
2	4
3	2
4	6
5	5
6	2
7	4
8	6
9	10
10	2
11	12
12	6
13	2
14	11
15	16
16	14
17	2
18	18
19	12
20	4
21	2
22	10
23	5
24	22
25	2
26	4
27	17
28	12
29	2
30	10
31	6
32	18
33	28
34	2
35	30
36	6
37	25
38	2
39	16
40	23
41	4
42	2
43	36
44	5
45	18
46	21
47	2
48	4
49	40
50	2
51	34
52	42
53	29
54	10
55	2
56	13
57	22
58	30
59	46
60	19
61	2
62	6
63	11
64	4
65	2
66	12
67	5
68	52
69	2
70	4
71	36
72	6
73	2
74	45
75	28
76	12
77	58
78	34
79	2
80	60
81	41
82	30
83	2

n	a(n)
1	2
2	4
3	2
4	6
5	5
6	2
7	4
8	6
9	10
10	2
11	12
12	6
13	2
14	11
15	16
16	14
17	2
18	18
19	12
20	4
21	2
22	10
23	5
24	22
25	2
26	4
27	17
28	12
29	2
30	10
31	6
32	18
33	28
34	2
35	30
36	6
37	25
38	2
39	16
40	23
41	4
42	2
43	36
44	5
45	18
46	21
47	2
48	4
49	40
50	2
51	34
52	42
53	29
54	10
55	2
56	13
57	22
58	30
59	46
60	19
61	2
62	6
63	11
64	4
65	2
66	12
67	5
68	52
69	2
70	4
71	36
72	6
73	2
74	45
75	28
76	12
77	58
78	34
79	2
80	60
81	41
82	30
83	2

n	a(n)
1	2
2	4
3	2
4	6
5	5
6	2
7	4
8	6
9	10
10	2
11	12
12	6
13	2
14	11
15	16
16	14
17	2
18	18
19	12
20	4
21	2
22	10
23	5
24	22
25	2
26	4
27	17
28	12
29	2
30	10
31	6
32	18
33	28
34	2
35	30
36	6
37	25
38	2
39	16
40	23
41	4
42	2
43	36
44	5
45	18
46	21
47	2
48	4
49	40
50	2
51	34
52	42
53	29
54	10
55	2
56	13
57	22
58	30
59	46
60	19
61	2
62	6
63	11
64	4
65	2
66	12
67	5
68	52
69	2
70	4
71	36
72	6
73	2
74	45
75	28
76	12
77	58
78	34
79	2
80	60
81	41
82	30
83	2