A274010 - cp's OEIS frontend

A274010 Boris Stechkin function: a(n) is the number of m with 2 <= m <= n and floor(n(m-1)/m) divisible by m-1.

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

[0, 0, 1, 2, 3, 3, 4, 4, 4, 5, 5, 4, 6, 6, 4, 6, 7, 5, 6, 6, 6, 8, 6, 4, 8, 9, 5, 6, 8, 6, 8, 8, 6, 8, 6, 6, 11, 9, 4, 6, 10, 8, 8, 8, 6, 10, 8, 4, 10, 11, 7, 8, 8, 6, 8, 10, 10, 10, 6, 4, 12, 12, 4, 8, 11, 9, 10, 8, 6, 8, 10, 8, 12, 12, 4, 8, 10, 8, 10, 8, 10]

cp's OEIS Frontend

A274010 Boris Stechkin function: a(n) is the number of m with 2 <= m <= n and floor(n(m-1)/m) divisible by m-1.

Table of values

List of values

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

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

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