A006197 - cp's OEIS frontend

A006197 Least number not dividing binomial(2n,n).

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

[3, 4, 3, 3, 5, 5, 5, 4, 3, 3, 5, 3, 3, 7, 7, 4, 7, 8, 9, 8, 7, 7, 7, 7, 5, 5, 3, 3, 9, 3, 3, 4, 8, 8, 5, 3, 3, 9, 3, 3, 13, 13, 13, 11, 11, 11, 11, 8, 7, 5, 5, 5, 13, 9, 5, 5, 5, 7, 7, 5, 5, 5, 7, 4, 7, 7, 9, 8, 13, 7, 7]

cp's OEIS Frontend

A006197 Least number not dividing binomial(2n,n).

Table of values

List of values

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

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

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