A141818 - cp's OEIS frontend

A141818 "Early bird" prime numbers: write the natural numbers in a string 12345678910111213.... Sequence gives prime numbers which occur in the string ahead of their natural place.

n	a(n)
1	23
2	31
3	41
4	43
5	53
6	61
7	67
8	71
9	73
10	83
11	89
12	97
13	101
14	131
15	151
16	181
17	191
18	211
19	223
20	241
21	251
22	263
23	271
24	281
25	311
26	313
27	317
28	331
29	353
30	401
31	419
32	421
33	431
34	433
35	461
36	463
37	491
38	503

[23, 31, 41, 43, 53, 61, 67, 71, 73, 83, 89, 97, 101, 131, 151, 181, 191, 211, 223, 241, 251, 263, 271, 281, 311, 313, 317, 331, 353, 401, 419, 421, 431, 433, 461, 463, 491, 503]

cp's OEIS Frontend

A141818 "Early bird" prime numbers: write the natural numbers in a string 12345678910111213.... Sequence gives prime numbers which occur in the string ahead of their natural place.

Table of values

List of values

n	a(n)
1	23
2	31
3	41
4	43
5	53
6	61
7	67
8	71
9	73
10	83
11	89
12	97
13	101
14	131
15	151
16	181
17	191
18	211
19	223
20	241
21	251
22	263
23	271
24	281
25	311
26	313
27	317
28	331
29	353
30	401
31	419
32	421
33	431
34	433
35	461
36	463
37	491
38	503

n	a(n)
1	23
2	31
3	41
4	43
5	53
6	61
7	67
8	71
9	73
10	83
11	89
12	97
13	101
14	131
15	151
16	181
17	191
18	211
19	223
20	241
21	251
22	263
23	271
24	281
25	311
26	313
27	317
28	331
29	353
30	401
31	419
32	421
33	431
34	433
35	461
36	463
37	491
38	503

n	a(n)
1	23
2	31
3	41
4	43
5	53
6	61
7	67
8	71
9	73
10	83
11	89
12	97
13	101
14	131
15	151
16	181
17	191
18	211
19	223
20	241
21	251
22	263
23	271
24	281
25	311
26	313
27	317
28	331
29	353
30	401
31	419
32	421
33	431
34	433
35	461
36	463
37	491
38	503