A138389 - cp's OEIS frontend

A138389 Binomial primes: positive integers n such that every i not coprime to n and not exceeding n/2 does not divide binomial(n-i-1,i-1).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	13
14	15
15	17
16	19
17	20
18	21
19	23
20	24
21	25
22	29
23	31
24	33
25	35
26	37
27	41
28	43
29	47
30	49
31	53
32	59
33	61
34	67
35	71
36	73
37	79
38	83
39	89
40	97
41	101
42	103
43	107
44	109
45	113
46	121
47	127
48	131
49	137
50	139
51	143
52	149
53	151
54	157
55	163
56	167
57	169
58	173
59	179
60	181
61	191
62	193
63	197
64	199

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 17, 19, 20, 21, 23, 24, 25, 29, 31, 33, 35, 37, 41, 43, 47, 49, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 121, 127, 131, 137, 139, 143, 149, 151, 157, 163, 167, 169, 173, 179, 181, 191, 193, 197, 199]

cp's OEIS Frontend

A138389 Binomial primes: positive integers n such that every i not coprime to n and not exceeding n/2 does not divide binomial(n-i-1,i-1).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	13
14	15
15	17
16	19
17	20
18	21
19	23
20	24
21	25
22	29
23	31
24	33
25	35
26	37
27	41
28	43
29	47
30	49
31	53
32	59
33	61
34	67
35	71
36	73
37	79
38	83
39	89
40	97
41	101
42	103
43	107
44	109
45	113
46	121
47	127
48	131
49	137
50	139
51	143
52	149
53	151
54	157
55	163
56	167
57	169
58	173
59	179
60	181
61	191
62	193
63	197
64	199

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	13
14	15
15	17
16	19
17	20
18	21
19	23
20	24
21	25
22	29
23	31
24	33
25	35
26	37
27	41
28	43
29	47
30	49
31	53
32	59
33	61
34	67
35	71
36	73
37	79
38	83
39	89
40	97
41	101
42	103
43	107
44	109
45	113
46	121
47	127
48	131
49	137
50	139
51	143
52	149
53	151
54	157
55	163
56	167
57	169
58	173
59	179
60	181
61	191
62	193
63	197
64	199

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	13
14	15
15	17
16	19
17	20
18	21
19	23
20	24
21	25
22	29
23	31
24	33
25	35
26	37
27	41
28	43
29	47
30	49
31	53
32	59
33	61
34	67
35	71
36	73
37	79
38	83
39	89
40	97
41	101
42	103
43	107
44	109
45	113
46	121
47	127
48	131
49	137
50	139
51	143
52	149
53	151
54	157
55	163
56	167
57	169
58	173
59	179
60	181
61	191
62	193
63	197
64	199