A110786 - cp's OEIS frontend

A110786 To obtain a(n), take the n-th palindrome P = A002113(n) and concatenate it with the smallest palindrome Q such that PQ is a prime.

n	a(n)
1	11
2	23
3	31
4	41
5	53
6	61
7	71
8	83
9	97
10	113
11	223
12	331
13	443
14	557
15	661
16	773
17	881
18	991
19	1013
20	1117
21	1213
22	1319
23	14177
24	1511
25	1613
26	171131
27	1811
28	1913
29	2027
30	2129
31	2221
32	232171
33	2423
34	2521
35	2621
36	2729
37	28211
38	2927
39	3037
40	3137
41	32377
42	3331
43	3433
44	3533

[11, 23, 31, 41, 53, 61, 71, 83, 97, 113, 223, 331, 443, 557, 661, 773, 881, 991, 1013, 1117, 1213, 1319, 14177, 1511, 1613, 171131, 1811, 1913, 2027, 2129, 2221, 232171, 2423, 2521, 2621, 2729, 28211, 2927, 3037, 3137, 32377, 3331, 3433, 3533]

cp's OEIS Frontend

A110786 To obtain a(n), take the n-th palindrome P = A002113(n) and concatenate it with the smallest palindrome Q such that PQ is a prime.

Table of values

List of values