A297003 - cp's OEIS frontend

A297003 a(n) = 2^(n-1), n=1,2,3; for n >= 4, a(n) is the number of the previous terms dividing n.

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

[1, 2, 4, 3, 1, 4, 2, 6, 3, 4, 2, 11, 2, 6, 4, 10, 2, 11, 2, 13, 4, 10, 2, 18, 2, 11, 4, 16, 2, 17, 2, 19, 7, 13, 3, 24, 2, 14, 7, 21, 2, 23, 2, 24, 5, 16, 2, 31, 4, 19, 6, 25, 2, 24, 6, 27, 7, 17, 2, 35, 2, 20, 9, 28, 5, 29, 2, 29, 6, 29, 2, 41, 2, 22, 8, 31]

cp's OEIS Frontend

A297003 a(n) = 2^(n-1), n=1,2,3; for n >= 4, a(n) is the number of the previous terms dividing n.

Table of values

List of values

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

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

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