A135591 - cp's OEIS frontend

A135591 a(1)=1; for n > 1, a(n) is number of earlier terms equal to number of proper divisors of n.

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	1
7	4
8	1
9	1
10	1
11	7
12	0
13	7
14	1
15	1
16	1
17	10
18	0
19	10
20	0
21	1
22	1
23	12
24	2
25	2
26	1
27	1
28	0
29	14
30	2
31	14
32	0
33	1
34	1
35	1
36	0
37	17
38	1
39	1
40	2
41	19
42	2
43	19
44	0
45	0
46	1
47	20
48	0
49	6
50	0
51	1
52	0
53	21
54	2
55	1
56	2
57	1
58	1
59	24
60	0
61	24
62	1
63	0
64	1
65	1
66	2
67	27
68	0
69	1
70	2
71	28
72	0
73	28
74	1
75	0
76	0
77	1
78	2
79	30
80	0
81	1
82	1
83	32
84	0
85	1
86	1
87	1
88	2
89	35
90	0
91	1
92	0
93	1
94	1
95	1
96	0
97	39

[1, 1, 2, 1, 3, 1, 4, 1, 1, 1, 7, 0, 7, 1, 1, 1, 10, 0, 10, 0, 1, 1, 12, 2, 2, 1, 1, 0, 14, 2, 14, 0, 1, 1, 1, 0, 17, 1, 1, 2, 19, 2, 19, 0, 0, 1, 20, 0, 6, 0, 1, 0, 21, 2, 1, 2, 1, 1, 24, 0, 24, 1, 0, 1, 1, 2, 27, 0, 1, 2, 28, 0, 28, 1, 0, 0, 1, 2, 30, 0, 1, 1, 32, 0, 1, 1, 1, 2, 35, 0, 1, 0, 1, 1, 1, 0, 39]

cp's OEIS Frontend

A135591 a(1)=1; for n > 1, a(n) is number of earlier terms equal to number of proper divisors of 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	1
10	1
11	7
12	0
13	7
14	1
15	1
16	1
17	10
18	0
19	10
20	0
21	1
22	1
23	12
24	2
25	2
26	1
27	1
28	0
29	14
30	2
31	14
32	0
33	1
34	1
35	1
36	0
37	17
38	1
39	1
40	2
41	19
42	2
43	19
44	0
45	0
46	1
47	20
48	0
49	6
50	0
51	1
52	0
53	21
54	2
55	1
56	2
57	1
58	1
59	24
60	0
61	24
62	1
63	0
64	1
65	1
66	2
67	27
68	0
69	1
70	2
71	28
72	0
73	28
74	1
75	0
76	0
77	1
78	2
79	30
80	0
81	1
82	1
83	32
84	0
85	1
86	1
87	1
88	2
89	35
90	0
91	1
92	0
93	1
94	1
95	1
96	0
97	39

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	1
7	4
8	1
9	1
10	1
11	7
12	0
13	7
14	1
15	1
16	1
17	10
18	0
19	10
20	0
21	1
22	1
23	12
24	2
25	2
26	1
27	1
28	0
29	14
30	2
31	14
32	0
33	1
34	1
35	1
36	0
37	17
38	1
39	1
40	2
41	19
42	2
43	19
44	0
45	0
46	1
47	20
48	0
49	6
50	0
51	1
52	0
53	21
54	2
55	1
56	2
57	1
58	1
59	24
60	0
61	24
62	1
63	0
64	1
65	1
66	2
67	27
68	0
69	1
70	2
71	28
72	0
73	28
74	1
75	0
76	0
77	1
78	2
79	30
80	0
81	1
82	1
83	32
84	0
85	1
86	1
87	1
88	2
89	35
90	0
91	1
92	0
93	1
94	1
95	1
96	0
97	39

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	1
7	4
8	1
9	1
10	1
11	7
12	0
13	7
14	1
15	1
16	1
17	10
18	0
19	10
20	0
21	1
22	1
23	12
24	2
25	2
26	1
27	1
28	0
29	14
30	2
31	14
32	0
33	1
34	1
35	1
36	0
37	17
38	1
39	1
40	2
41	19
42	2
43	19
44	0
45	0
46	1
47	20
48	0
49	6
50	0
51	1
52	0
53	21
54	2
55	1
56	2
57	1
58	1
59	24
60	0
61	24
62	1
63	0
64	1
65	1
66	2
67	27
68	0
69	1
70	2
71	28
72	0
73	28
74	1
75	0
76	0
77	1
78	2
79	30
80	0
81	1
82	1
83	32
84	0
85	1
86	1
87	1
88	2
89	35
90	0
91	1
92	0
93	1
94	1
95	1
96	0
97	39