A354092 - cp's OEIS frontend

A354092 Fully multiplicative prime shift where the primes of the form 3k+2 are replaced by the previous such prime (with 2 -> 1), and primes of the form 3k and 3k+1 stay as they are.

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	3
7	7
8	1
9	9
10	2
11	5
12	3
13	13
14	7
15	6
16	1
17	11
18	9
19	19
20	2
21	21
22	5
23	17
24	3
25	4
26	13
27	27
28	7
29	23
30	6
31	31
32	1
33	15
34	11
35	14
36	9
37	37
38	19
39	39
40	2
41	29
42	21
43	43
44	5
45	18
46	17
47	41
48	3
49	49
50	4
51	33
52	13
53	47
54	27
55	10
56	7
57	57
58	23
59	53
60	6
61	61
62	31
63	63
64	1
65	26
66	15
67	67
68	11
69	51
70	14
71	59
72	9
73	73
74	37
75	12
76	19
77	35
78	39
79	79
80	2
81	81
82	29
83	71
84	21
85	22
86	43
87	69
88	5
89	83

[1, 1, 3, 1, 2, 3, 7, 1, 9, 2, 5, 3, 13, 7, 6, 1, 11, 9, 19, 2, 21, 5, 17, 3, 4, 13, 27, 7, 23, 6, 31, 1, 15, 11, 14, 9, 37, 19, 39, 2, 29, 21, 43, 5, 18, 17, 41, 3, 49, 4, 33, 13, 47, 27, 10, 7, 57, 23, 53, 6, 61, 31, 63, 1, 26, 15, 67, 11, 51, 14, 59, 9, 73, 37, 12, 19, 35, 39, 79, 2, 81, 29, 71, 21, 22, 43, 69, 5, 83]

cp's OEIS Frontend

A354092 Fully multiplicative prime shift where the primes of the form 3k+2 are replaced by the previous such prime (with 2 -> 1), and primes of the form 3k and 3k+1 stay as they are.

Table of values

List of values

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	3
7	7
8	1
9	9
10	2
11	5
12	3
13	13
14	7
15	6
16	1
17	11
18	9
19	19
20	2
21	21
22	5
23	17
24	3
25	4
26	13
27	27
28	7
29	23
30	6
31	31
32	1
33	15
34	11
35	14
36	9
37	37
38	19
39	39
40	2
41	29
42	21
43	43
44	5
45	18
46	17
47	41
48	3
49	49
50	4
51	33
52	13
53	47
54	27
55	10
56	7
57	57
58	23
59	53
60	6
61	61
62	31
63	63
64	1
65	26
66	15
67	67
68	11
69	51
70	14
71	59
72	9
73	73
74	37
75	12
76	19
77	35
78	39
79	79
80	2
81	81
82	29
83	71
84	21
85	22
86	43
87	69
88	5
89	83

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	3
7	7
8	1
9	9
10	2
11	5
12	3
13	13
14	7
15	6
16	1
17	11
18	9
19	19
20	2
21	21
22	5
23	17
24	3
25	4
26	13
27	27
28	7
29	23
30	6
31	31
32	1
33	15
34	11
35	14
36	9
37	37
38	19
39	39
40	2
41	29
42	21
43	43
44	5
45	18
46	17
47	41
48	3
49	49
50	4
51	33
52	13
53	47
54	27
55	10
56	7
57	57
58	23
59	53
60	6
61	61
62	31
63	63
64	1
65	26
66	15
67	67
68	11
69	51
70	14
71	59
72	9
73	73
74	37
75	12
76	19
77	35
78	39
79	79
80	2
81	81
82	29
83	71
84	21
85	22
86	43
87	69
88	5
89	83

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	3
7	7
8	1
9	9
10	2
11	5
12	3
13	13
14	7
15	6
16	1
17	11
18	9
19	19
20	2
21	21
22	5
23	17
24	3
25	4
26	13
27	27
28	7
29	23
30	6
31	31
32	1
33	15
34	11
35	14
36	9
37	37
38	19
39	39
40	2
41	29
42	21
43	43
44	5
45	18
46	17
47	41
48	3
49	49
50	4
51	33
52	13
53	47
54	27
55	10
56	7
57	57
58	23
59	53
60	6
61	61
62	31
63	63
64	1
65	26
66	15
67	67
68	11
69	51
70	14
71	59
72	9
73	73
74	37
75	12
76	19
77	35
78	39
79	79
80	2
81	81
82	29
83	71
84	21
85	22
86	43
87	69
88	5
89	83