A375690 - cp's OEIS frontend

A375690 a(1) = 3; for n > 1, a(n) is the smallest palindromic prime containing exactly 2 more digits on each end than a(n-1), with a(n-1) as the central substring.

n	a(n)
1	3
2	10301
3	101030101
4	1210103010121
5	12121010301012121
6	111212101030101212111
7	3111121210103010121211113
8	17311112121010301012121111371
9	961731111212101030101212111137169
10	3196173111121210103010121211113716913
11	95319617311112121010301012121111371691359
12	109531961731111212101030101212111137169135901
13	1410953196173111121210103010121211113716913590141
14	13141095319617311112121010301012121111371691359014131

[3, 10301, 101030101, 1210103010121, 12121010301012121, 111212101030101212111, 3111121210103010121211113, 17311112121010301012121111371, 961731111212101030101212111137169, 3196173111121210103010121211113716913, 95319617311112121010301012121111371691359, 109531961731111212101030101212111137169135901, 1410953196173111121210103010121211113716913590141, 13141095319617311112121010301012121111371691359014131]

cp's OEIS Frontend

A375690 a(1) = 3; for n > 1, a(n) is the smallest palindromic prime containing exactly 2 more digits on each end than a(n-1), with a(n-1) as the central substring.

Table of values

List of values