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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A047076 a(n+1) is the smallest palindromic prime containing exactly 2 more digits on each end than the previous term, with a(n) as a central substring.

Table of values

n a(n)
1 2
2 30203
3 133020331
4 1713302033171
5 12171330203317121
6 151217133020331712151
7 1815121713302033171215181
8 16181512171330203317121518161
9 331618151217133020331712151816133
10 9333161815121713302033171215181613339
11 11933316181512171330203317121518161333911

List of values

[2, 30203, 133020331, 1713302033171, 12171330203317121, 151217133020331712151, 1815121713302033171215181, 16181512171330203317121518161, 331618151217133020331712151816133, 9333161815121713302033171215181613339, 11933316181512171330203317121518161333911]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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