A357980 - cp's OEIS frontend

A357980 Replace prime(k) with prime(A000720(k)) in the prime factorization of n, assuming prime(0) = 1.

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

[1, 1, 2, 1, 3, 2, 3, 1, 4, 3, 5, 2, 5, 3, 6, 1, 7, 4, 7, 3, 6, 5, 7, 2, 9, 5, 8, 3, 7, 6, 11, 1, 10, 7, 9, 4, 11, 7, 10, 3, 13, 6, 13, 5, 12, 7, 13, 2, 9, 9, 14, 5, 13, 8, 15, 3, 14, 7, 17, 6, 17, 11, 12, 1, 15, 10, 19, 7, 14, 9, 19, 4, 19, 11, 18, 7, 15, 10]

cp's OEIS Frontend

A357980 Replace prime(k) with prime(A000720(k)) in the prime factorization of n, assuming prime(0) = 1.

Table of values

List of values

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

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

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