A051771 - cp's OEIS frontend

A051771 Values of k such that there exists a binomial coefficient C(n,k) where C(n,k)-1 and C(n,k)+1 are twin primes and 2<=k<=floor(n/2).

n	a(n)
0	2
1	5
2	26
3	13
4	35
5	44
6	37
7	23
8	78
9	46
10	34
11	69
12	44
13	106
14	41
15	50
16	90
17	89
18	132
19	107
20	137
21	143
22	184
23	145
24	133
25	166
26	181
27	82
28	158
29	198
30	157
31	175
32	183
33	163
34	317
35	293
36	140
37	123
38	317
39	251
40	218
41	169
42	170
43	103
44	327
45	229
46	329
47	73
48	190
49	79
50	51
51	95
52	79
53	290
54	395
55	432
56	126

[2, 5, 26, 13, 35, 44, 37, 23, 78, 46, 34, 69, 44, 106, 41, 50, 90, 89, 132, 107, 137, 143, 184, 145, 133, 166, 181, 82, 158, 198, 157, 175, 183, 163, 317, 293, 140, 123, 317, 251, 218, 169, 170, 103, 327, 229, 329, 73, 190, 79, 51, 95, 79, 290, 395, 432, 126]

cp's OEIS Frontend

A051771 Values of k such that there exists a binomial coefficient C(n,k) where C(n,k)-1 and C(n,k)+1 are twin primes and 2<=k<=floor(n/2).

Table of values

List of values

n	a(n)
0	2
1	5
2	26
3	13
4	35
5	44
6	37
7	23
8	78
9	46
10	34
11	69
12	44
13	106
14	41
15	50
16	90
17	89
18	132
19	107
20	137
21	143
22	184
23	145
24	133
25	166
26	181
27	82
28	158
29	198
30	157
31	175
32	183
33	163
34	317
35	293
36	140
37	123
38	317
39	251
40	218
41	169
42	170
43	103
44	327
45	229
46	329
47	73
48	190
49	79
50	51
51	95
52	79
53	290
54	395
55	432
56	126

n	a(n)
0	2
1	5
2	26
3	13
4	35
5	44
6	37
7	23
8	78
9	46
10	34
11	69
12	44
13	106
14	41
15	50
16	90
17	89
18	132
19	107
20	137
21	143
22	184
23	145
24	133
25	166
26	181
27	82
28	158
29	198
30	157
31	175
32	183
33	163
34	317
35	293
36	140
37	123
38	317
39	251
40	218
41	169
42	170
43	103
44	327
45	229
46	329
47	73
48	190
49	79
50	51
51	95
52	79
53	290
54	395
55	432
56	126

n	a(n)
0	2
1	5
2	26
3	13
4	35
5	44
6	37
7	23
8	78
9	46
10	34
11	69
12	44
13	106
14	41
15	50
16	90
17	89
18	132
19	107
20	137
21	143
22	184
23	145
24	133
25	166
26	181
27	82
28	158
29	198
30	157
31	175
32	183
33	163
34	317
35	293
36	140
37	123
38	317
39	251
40	218
41	169
42	170
43	103
44	327
45	229
46	329
47	73
48	190
49	79
50	51
51	95
52	79
53	290
54	395
55	432
56	126