A178101 - cp's OEIS frontend

A178101 Cardinality of the set of d, 2<=d<=n/2, which divide binomial(n-d-1,d-1) and are not coprime to n.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	1
15	0
16	1
17	0
18	1
19	0
20	0
21	0
22	1
23	0
24	0
25	0
26	2
27	1
28	1
29	0
30	2
31	0
32	3
33	0
34	4
35	0
36	2
37	0
38	3
39	1
40	2
41	0
42	2
43	0
44	2
45	3
46	5
47	0
48	5
49	0
50	6
51	3
52	3
53	0
54	6
55	1
56	3
57	3
58	8
59	0
60	5
61	0
62	11
63	3
64	8
65	1
66	8
67	0
68	5
69	3
70	7
71	0
72	6
73	0
74	8
75	4
76	5
77	1
78	7
79	0
80	7
81	5
82	10
83	0
84	4
85	1
86	9
87	3
88	6
89	0
90	10
91	2
92	8
93	4
94	15
95	2
96	10
97	0
98	16
99	6
100	10

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 2, 1, 1, 0, 2, 0, 3, 0, 4, 0, 2, 0, 3, 1, 2, 0, 2, 0, 2, 3, 5, 0, 5, 0, 6, 3, 3, 0, 6, 1, 3, 3, 8, 0, 5, 0, 11, 3, 8, 1, 8, 0, 5, 3, 7, 0, 6, 0, 8, 4, 5, 1, 7, 0, 7, 5, 10, 0, 4, 1, 9, 3, 6, 0, 10, 2, 8, 4, 15, 2, 10, 0, 16, 6, 10]

cp's OEIS Frontend

A178101 Cardinality of the set of d, 2<=d<=n/2, which divide binomial(n-d-1,d-1) and are not coprime to n.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	1
15	0
16	1
17	0
18	1
19	0
20	0
21	0
22	1
23	0
24	0
25	0
26	2
27	1
28	1
29	0
30	2
31	0
32	3
33	0
34	4
35	0
36	2
37	0
38	3
39	1
40	2
41	0
42	2
43	0
44	2
45	3
46	5
47	0
48	5
49	0
50	6
51	3
52	3
53	0
54	6
55	1
56	3
57	3
58	8
59	0
60	5
61	0
62	11
63	3
64	8
65	1
66	8
67	0
68	5
69	3
70	7
71	0
72	6
73	0
74	8
75	4
76	5
77	1
78	7
79	0
80	7
81	5
82	10
83	0
84	4
85	1
86	9
87	3
88	6
89	0
90	10
91	2
92	8
93	4
94	15
95	2
96	10
97	0
98	16
99	6
100	10

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	1
15	0
16	1
17	0
18	1
19	0
20	0
21	0
22	1
23	0
24	0
25	0
26	2
27	1
28	1
29	0
30	2
31	0
32	3
33	0
34	4
35	0
36	2
37	0
38	3
39	1
40	2
41	0
42	2
43	0
44	2
45	3
46	5
47	0
48	5
49	0
50	6
51	3
52	3
53	0
54	6
55	1
56	3
57	3
58	8
59	0
60	5
61	0
62	11
63	3
64	8
65	1
66	8
67	0
68	5
69	3
70	7
71	0
72	6
73	0
74	8
75	4
76	5
77	1
78	7
79	0
80	7
81	5
82	10
83	0
84	4
85	1
86	9
87	3
88	6
89	0
90	10
91	2
92	8
93	4
94	15
95	2
96	10
97	0
98	16
99	6
100	10

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	1
15	0
16	1
17	0
18	1
19	0
20	0
21	0
22	1
23	0
24	0
25	0
26	2
27	1
28	1
29	0
30	2
31	0
32	3
33	0
34	4
35	0
36	2
37	0
38	3
39	1
40	2
41	0
42	2
43	0
44	2
45	3
46	5
47	0
48	5
49	0
50	6
51	3
52	3
53	0
54	6
55	1
56	3
57	3
58	8
59	0
60	5
61	0
62	11
63	3
64	8
65	1
66	8
67	0
68	5
69	3
70	7
71	0
72	6
73	0
74	8
75	4
76	5
77	1
78	7
79	0
80	7
81	5
82	10
83	0
84	4
85	1
86	9
87	3
88	6
89	0
90	10
91	2
92	8
93	4
94	15
95	2
96	10
97	0
98	16
99	6
100	10