A205011 - cp's OEIS frontend

A205011 The index j such that n divides C(2k-2,k-1)-C(2j-2,j-1), where k is the least index (A205010) for which such j exists.

n	a(n)
1	1
2	2
3	2
4	2
5	1
6	2
7	3
8	3
9	2
10	4
11	7
12	6
13	5
14	3
15	6
16	3
17	2
18	2
19	1
20	6
21	6
22	7
23	1
24	6
25	4
26	5
27	3
28	6
29	4
30	6
31	11
32	3
33	7
34	2
35	2
36	4
37	2
38	7
39	8
40	5
41	3
42	6
43	15
44	7
45	4
46	4
47	1
48	6
49	2
50	4
51	3
52	8
53	6
54	3
55	9
56	6
57	7
58	4
59	18
60	6

[1, 2, 2, 2, 1, 2, 3, 3, 2, 4, 7, 6, 5, 3, 6, 3, 2, 2, 1, 6, 6, 7, 1, 6, 4, 5, 3, 6, 4, 6, 11, 3, 7, 2, 2, 4, 2, 7, 8, 5, 3, 6, 15, 7, 4, 4, 1, 6, 2, 4, 3, 8, 6, 3, 9, 6, 7, 4, 18, 6]

cp's OEIS Frontend

A205011 The index j such that n divides C(2k-2,k-1)-C(2j-2,j-1), where k is the least index (A205010) for which such j exists.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	2
5	1
6	2
7	3
8	3
9	2
10	4
11	7
12	6
13	5
14	3
15	6
16	3
17	2
18	2
19	1
20	6
21	6
22	7
23	1
24	6
25	4
26	5
27	3
28	6
29	4
30	6
31	11
32	3
33	7
34	2
35	2
36	4
37	2
38	7
39	8
40	5
41	3
42	6
43	15
44	7
45	4
46	4
47	1
48	6
49	2
50	4
51	3
52	8
53	6
54	3
55	9
56	6
57	7
58	4
59	18
60	6

n	a(n)
1	1
2	2
3	2
4	2
5	1
6	2
7	3
8	3
9	2
10	4
11	7
12	6
13	5
14	3
15	6
16	3
17	2
18	2
19	1
20	6
21	6
22	7
23	1
24	6
25	4
26	5
27	3
28	6
29	4
30	6
31	11
32	3
33	7
34	2
35	2
36	4
37	2
38	7
39	8
40	5
41	3
42	6
43	15
44	7
45	4
46	4
47	1
48	6
49	2
50	4
51	3
52	8
53	6
54	3
55	9
56	6
57	7
58	4
59	18
60	6

n	a(n)
1	1
2	2
3	2
4	2
5	1
6	2
7	3
8	3
9	2
10	4
11	7
12	6
13	5
14	3
15	6
16	3
17	2
18	2
19	1
20	6
21	6
22	7
23	1
24	6
25	4
26	5
27	3
28	6
29	4
30	6
31	11
32	3
33	7
34	2
35	2
36	4
37	2
38	7
39	8
40	5
41	3
42	6
43	15
44	7
45	4
46	4
47	1
48	6
49	2
50	4
51	3
52	8
53	6
54	3
55	9
56	6
57	7
58	4
59	18
60	6