A357975 - cp's OEIS frontend

A357975 Divide all prime indices by 2, round down, and take the number with those prime indices, assuming prime(0) = 1.

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

[1, 1, 2, 1, 2, 2, 3, 1, 4, 2, 3, 2, 5, 3, 4, 1, 5, 4, 7, 2, 6, 3, 7, 2, 4, 5, 8, 3, 11, 4, 11, 1, 6, 5, 6, 4, 13, 7, 10, 2, 13, 6, 17, 3, 8, 7, 17, 2, 9, 4, 10, 5, 19, 8, 6, 3, 14, 11, 19, 4, 23, 11, 12, 1, 10, 6, 23, 5, 14, 6, 29, 4, 29, 13, 8, 7, 9, 10, 31]

cp's OEIS Frontend

A357975 Divide all prime indices by 2, round down, and take the number with those prime indices, assuming prime(0) = 1.

Table of values

List of values

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

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

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