A027749 - cp's OEIS frontend

A027749 Take the list 1,2,3,4,... and replace each n with all d > 1 that divide n.

n	a(n)
1	1
2	2
3	3
4	2
5	4
6	5
7	2
8	3
9	6
10	7
11	2
12	4
13	8
14	3
15	9
16	2
17	5
18	10
19	11
20	2
21	3
22	4
23	6
24	12
25	13
26	2
27	7
28	14
29	3
30	5
31	15
32	2
33	4
34	8
35	16
36	17
37	2
38	3
39	6
40	9
41	18
42	19
43	2
44	4
45	5
46	10
47	20
48	3
49	7
50	21
51	2
52	11
53	22
54	23
55	2
56	3
57	4
58	6
59	8
60	12
61	24
62	5
63	25
64	2
65	13
66	26
67	3
68	9
69	27
70	2
71	4
72	7
73	14
74	28
75	29
76	2
77	3
78	5
79	6
80	10
81	15
82	30
83	31
84	2
85	4
86	8
87	16
88	32
89	3
90	11
91	33
92	2
93	17
94	34
95	5
96	7
97	35

[1, 2, 3, 2, 4, 5, 2, 3, 6, 7, 2, 4, 8, 3, 9, 2, 5, 10, 11, 2, 3, 4, 6, 12, 13, 2, 7, 14, 3, 5, 15, 2, 4, 8, 16, 17, 2, 3, 6, 9, 18, 19, 2, 4, 5, 10, 20, 3, 7, 21, 2, 11, 22, 23, 2, 3, 4, 6, 8, 12, 24, 5, 25, 2, 13, 26, 3, 9, 27, 2, 4, 7, 14, 28, 29, 2, 3, 5, 6, 10, 15, 30, 31, 2, 4, 8, 16, 32, 3, 11, 33, 2, 17, 34, 5, 7, 35]

cp's OEIS Frontend

A027749 Take the list 1,2,3,4,... and replace each n with all d > 1 that divide n.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	2
5	4
6	5
7	2
8	3
9	6
10	7
11	2
12	4
13	8
14	3
15	9
16	2
17	5
18	10
19	11
20	2
21	3
22	4
23	6
24	12
25	13
26	2
27	7
28	14
29	3
30	5
31	15
32	2
33	4
34	8
35	16
36	17
37	2
38	3
39	6
40	9
41	18
42	19
43	2
44	4
45	5
46	10
47	20
48	3
49	7
50	21
51	2
52	11
53	22
54	23
55	2
56	3
57	4
58	6
59	8
60	12
61	24
62	5
63	25
64	2
65	13
66	26
67	3
68	9
69	27
70	2
71	4
72	7
73	14
74	28
75	29
76	2
77	3
78	5
79	6
80	10
81	15
82	30
83	31
84	2
85	4
86	8
87	16
88	32
89	3
90	11
91	33
92	2
93	17
94	34
95	5
96	7
97	35

n	a(n)
1	1
2	2
3	3
4	2
5	4
6	5
7	2
8	3
9	6
10	7
11	2
12	4
13	8
14	3
15	9
16	2
17	5
18	10
19	11
20	2
21	3
22	4
23	6
24	12
25	13
26	2
27	7
28	14
29	3
30	5
31	15
32	2
33	4
34	8
35	16
36	17
37	2
38	3
39	6
40	9
41	18
42	19
43	2
44	4
45	5
46	10
47	20
48	3
49	7
50	21
51	2
52	11
53	22
54	23
55	2
56	3
57	4
58	6
59	8
60	12
61	24
62	5
63	25
64	2
65	13
66	26
67	3
68	9
69	27
70	2
71	4
72	7
73	14
74	28
75	29
76	2
77	3
78	5
79	6
80	10
81	15
82	30
83	31
84	2
85	4
86	8
87	16
88	32
89	3
90	11
91	33
92	2
93	17
94	34
95	5
96	7
97	35

n	a(n)
1	1
2	2
3	3
4	2
5	4
6	5
7	2
8	3
9	6
10	7
11	2
12	4
13	8
14	3
15	9
16	2
17	5
18	10
19	11
20	2
21	3
22	4
23	6
24	12
25	13
26	2
27	7
28	14
29	3
30	5
31	15
32	2
33	4
34	8
35	16
36	17
37	2
38	3
39	6
40	9
41	18
42	19
43	2
44	4
45	5
46	10
47	20
48	3
49	7
50	21
51	2
52	11
53	22
54	23
55	2
56	3
57	4
58	6
59	8
60	12
61	24
62	5
63	25
64	2
65	13
66	26
67	3
68	9
69	27
70	2
71	4
72	7
73	14
74	28
75	29
76	2
77	3
78	5
79	6
80	10
81	15
82	30
83	31
84	2
85	4
86	8
87	16
88	32
89	3
90	11
91	33
92	2
93	17
94	34
95	5
96	7
97	35