A232066 - cp's OEIS frontend

A232066 Periodic primes: primes p whose decimal expansion can be written as sss...st, where s is nonempty string of digits not beginning with 0, there are at least two copies of s, and t (which may be absent) is a prefix of s.

n	a(n)
1	11
2	18181
3	32323
4	35353
5	72727
6	74747
7	78787
8	94949
9	95959
10	1041041
11	1051051
12	1131131
13	1191191
14	1201201
15	1212121
16	1221221
17	1231231
18	1261261
19	1281281
20	1311311
21	1381381
22	1401401
23	1411411
24	1491491
25	1501501
26	1551551
27	1581581
28	1616161
29	1621621
30	1641641
31	1671671

[11, 18181, 32323, 35353, 72727, 74747, 78787, 94949, 95959, 1041041, 1051051, 1131131, 1191191, 1201201, 1212121, 1221221, 1231231, 1261261, 1281281, 1311311, 1381381, 1401401, 1411411, 1491491, 1501501, 1551551, 1581581, 1616161, 1621621, 1641641, 1671671]

cp's OEIS Frontend

A232066 Periodic primes: primes p whose decimal expansion can be written as sss...st, where s is nonempty string of digits not beginning with 0, there are at least two copies of s, and t (which may be absent) is a prefix of s.

Table of values

List of values