A073078 - cp's OEIS frontend

A073078 Least k such that n divides C(2k,k).

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

[1, 1, 2, 3, 3, 2, 4, 7, 5, 3, 6, 5, 7, 4, 8, 15, 9, 5, 10, 3, 5, 6, 12, 7, 13, 7, 14, 5, 15, 8, 16, 31, 6, 9, 4, 5, 19, 10, 7, 13, 21, 5, 22, 6, 8, 12, 24, 15, 25, 13, 11, 7, 27, 14, 8, 11, 11, 15, 30, 14, 31, 16, 5, 63, 8, 6, 34, 9, 14, 4, 36, 14, 37, 19, 14, 10, 6, 7, 40, 15, 41, 21]

cp's OEIS Frontend

A073078 Least k such that n divides C(2k,k).

Table of values

List of values

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

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

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