A065520 - cp's OEIS frontend

A065520 Numbers n with the property that if m is formed from n by dropping any number (possibly zero) of initial or final digits then there is a prime ending with m.

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	9
7	11
8	13
9	17
10	19
11	21
12	23
13	27
14	29
15	31
16	33
17	37
18	39
19	51
20	53
21	57
22	59
23	71
24	73
25	77
26	79
27	91
28	93
29	97
30	99
31	111
32	113
33	117
34	119
35	131
36	133
37	137
38	139
39	171
40	173
41	177
42	179
43	191
44	193
45	197
46	199
47	211
48	213
49	217
50	219
51	231
52	233
53	237
54	239
55	271
56	273
57	277
58	279
59	291
60	293
61	297

[1, 2, 3, 5, 7, 9, 11, 13, 17, 19, 21, 23, 27, 29, 31, 33, 37, 39, 51, 53, 57, 59, 71, 73, 77, 79, 91, 93, 97, 99, 111, 113, 117, 119, 131, 133, 137, 139, 171, 173, 177, 179, 191, 193, 197, 199, 211, 213, 217, 219, 231, 233, 237, 239, 271, 273, 277, 279, 291, 293, 297]

cp's OEIS Frontend

A065520 Numbers n with the property that if m is formed from n by dropping any number (possibly zero) of initial or final digits then there is a prime ending with m.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	9
7	11
8	13
9	17
10	19
11	21
12	23
13	27
14	29
15	31
16	33
17	37
18	39
19	51
20	53
21	57
22	59
23	71
24	73
25	77
26	79
27	91
28	93
29	97
30	99
31	111
32	113
33	117
34	119
35	131
36	133
37	137
38	139
39	171
40	173
41	177
42	179
43	191
44	193
45	197
46	199
47	211
48	213
49	217
50	219
51	231
52	233
53	237
54	239
55	271
56	273
57	277
58	279
59	291
60	293
61	297

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	9
7	11
8	13
9	17
10	19
11	21
12	23
13	27
14	29
15	31
16	33
17	37
18	39
19	51
20	53
21	57
22	59
23	71
24	73
25	77
26	79
27	91
28	93
29	97
30	99
31	111
32	113
33	117
34	119
35	131
36	133
37	137
38	139
39	171
40	173
41	177
42	179
43	191
44	193
45	197
46	199
47	211
48	213
49	217
50	219
51	231
52	233
53	237
54	239
55	271
56	273
57	277
58	279
59	291
60	293
61	297

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	9
7	11
8	13
9	17
10	19
11	21
12	23
13	27
14	29
15	31
16	33
17	37
18	39
19	51
20	53
21	57
22	59
23	71
24	73
25	77
26	79
27	91
28	93
29	97
30	99
31	111
32	113
33	117
34	119
35	131
36	133
37	137
38	139
39	171
40	173
41	177
42	179
43	191
44	193
45	197
46	199
47	211
48	213
49	217
50	219
51	231
52	233
53	237
54	239
55	271
56	273
57	277
58	279
59	291
60	293
61	297