A064839 - cp's OEIS frontend

A064839 List the natural numbers starting a new row only with each new least prime signature (A025487). a(n) is the column position associated with n.

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

[1, 1, 2, 1, 3, 1, 4, 1, 2, 2, 5, 1, 6, 3, 4, 1, 7, 2, 8, 3, 5, 6, 9, 1, 3, 7, 2, 4, 10, 1, 11, 1, 8, 9, 10, 1, 12, 11, 12, 2, 13, 2, 14, 5, 6, 13, 15, 1, 4, 7, 14, 8, 16, 3, 15, 4, 16, 17, 17, 1, 18, 18, 9, 1, 19, 3, 19, 10, 20, 4, 20, 1, 21, 21, 11, 12, 22, 5, 22, 2, 2, 23, 23, 2, 24, 25, 26]

cp's OEIS Frontend

A064839 List the natural numbers starting a new row only with each new least prime signature (A025487). a(n) is the column position associated with n.

Table of values

List of values

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

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

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