A032685 - cp's OEIS frontend

A032685 Numbers k such that k surrounded by digit '9' is a prime.

n	a(n)
1	1
2	2
3	10
4	19
5	20
6	23
7	31
8	34
9	41
10	43
11	47
12	53
13	61
14	62
15	64
16	67
17	68
18	71
19	73
20	74
21	76
22	82
23	83
24	85
25	92
26	94
27	100
28	101
29	107
30	109
31	112
32	113
33	115
34	119
35	122
36	124
37	130
38	136
39	145
40	149
41	152
42	163
43	190
44	193
45	196
46	200
47	211
48	217
49	218
50	221
51	226
52	236
53	239
54	241
55	245

[1, 2, 10, 19, 20, 23, 31, 34, 41, 43, 47, 53, 61, 62, 64, 67, 68, 71, 73, 74, 76, 82, 83, 85, 92, 94, 100, 101, 107, 109, 112, 113, 115, 119, 122, 124, 130, 136, 145, 149, 152, 163, 190, 193, 196, 200, 211, 217, 218, 221, 226, 236, 239, 241, 245]

cp's OEIS Frontend

A032685 Numbers k such that k surrounded by digit '9' is a prime.

Table of values

List of values

n	a(n)
1	1
2	2
3	10
4	19
5	20
6	23
7	31
8	34
9	41
10	43
11	47
12	53
13	61
14	62
15	64
16	67
17	68
18	71
19	73
20	74
21	76
22	82
23	83
24	85
25	92
26	94
27	100
28	101
29	107
30	109
31	112
32	113
33	115
34	119
35	122
36	124
37	130
38	136
39	145
40	149
41	152
42	163
43	190
44	193
45	196
46	200
47	211
48	217
49	218
50	221
51	226
52	236
53	239
54	241
55	245

n	a(n)
1	1
2	2
3	10
4	19
5	20
6	23
7	31
8	34
9	41
10	43
11	47
12	53
13	61
14	62
15	64
16	67
17	68
18	71
19	73
20	74
21	76
22	82
23	83
24	85
25	92
26	94
27	100
28	101
29	107
30	109
31	112
32	113
33	115
34	119
35	122
36	124
37	130
38	136
39	145
40	149
41	152
42	163
43	190
44	193
45	196
46	200
47	211
48	217
49	218
50	221
51	226
52	236
53	239
54	241
55	245

n	a(n)
1	1
2	2
3	10
4	19
5	20
6	23
7	31
8	34
9	41
10	43
11	47
12	53
13	61
14	62
15	64
16	67
17	68
18	71
19	73
20	74
21	76
22	82
23	83
24	85
25	92
26	94
27	100
28	101
29	107
30	109
31	112
32	113
33	115
34	119
35	122
36	124
37	130
38	136
39	145
40	149
41	152
42	163
43	190
44	193
45	196
46	200
47	211
48	217
49	218
50	221
51	226
52	236
53	239
54	241
55	245