A007012 - cp's OEIS frontend

A007012 a(n) is number of k for which C(n,k) is not divisible by n.

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

[1, 0, 2, 2, 3, 2, 5, 2, 5, 4, 5, 2, 8, 2, 9, 8, 9, 2, 9, 2, 11, 8, 9, 2, 15, 6, 9, 10, 15, 2, 20, 2, 17, 8, 5, 10, 15, 2, 9, 10, 19, 2, 23, 2, 19, 20, 17, 2, 29, 8, 17, 20, 19, 2, 29, 10, 24, 8, 17, 2, 35, 2, 33, 18, 33, 16, 19, 2, 11, 20, 27, 2, 33, 2, 9, 30, 19, 16, 41, 2, 31, 28, 9, 2, 32, 16]

cp's OEIS Frontend

A007012 a(n) is number of k for which C(n,k) is not divisible by n.

Table of values

List of values

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

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

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