A227911 - cp's OEIS frontend

A227911 Number of remainders occurring only once when dividing n by 1,2,...n.

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

[1, 0, 1, 1, 1, 2, 2, 2, 3, 2, 2, 4, 4, 4, 5, 4, 4, 5, 5, 6, 7, 6, 6, 7, 7, 6, 7, 7, 7, 9, 9, 9, 10, 9, 9, 10, 10, 10, 11, 10, 10, 12, 12, 13, 14, 13, 13, 14, 14, 13, 14, 14, 14, 15, 15, 15, 16, 15, 15, 17, 17, 17, 18, 17, 17, 18, 18, 19, 20, 19, 19, 20, 20, 20, 21, 21, 21, 22, 22, 22, 23, 22, 22, 24, 24, 23]

cp's OEIS Frontend

A227911 Number of remainders occurring only once when dividing n by 1,2,...n.

Table of values

List of values

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

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

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