A099905 - cp's OEIS frontend

A099905 a(n) = binomial(2n-1, n-1) mod n.

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

[0, 1, 1, 3, 1, 0, 1, 3, 1, 8, 1, 2, 1, 10, 0, 3, 1, 12, 1, 10, 3, 14, 1, 6, 1, 16, 10, 0, 1, 2, 1, 3, 21, 20, 21, 26, 1, 22, 10, 10, 1, 0, 1, 24, 0, 26, 1, 30, 1, 28, 27, 48, 1, 30, 16, 44, 48, 32, 1, 48, 1, 34, 6, 35, 35, 0, 1, 18, 33, 20, 1, 18, 1, 40, 60, 16, 0, 72, 1, 10, 10, 44, 1, 56, 75]

cp's OEIS Frontend

A099905 a(n) = binomial(2n-1, n-1) mod n.

Table of values

List of values

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

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

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