cp's OEIS Frontend

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.

A088271 Palindromic primes that yield a prime when sandwiched between two 7's. (Prefixing and suffixing a 'seven' on both sides yields another pal prime).

Table of values

n a(n)
1 2
2 5
3 131
4 191
5 797
6 11411
7 15551
8 30203
9 31013
10 32423
11 36263
12 36563
13 38183
14 39293
15 72227
16 74747
17 77477
18 94349
19 94949
20 1003001
21 1055501
22 1074701
23 1085801
24 1120211
25 1123211
26 1153511
27 1178711
28 1183811
29 1221221
30 1311131
31 1317131
32 1363631

List of values

[2, 5, 131, 191, 797, 11411, 15551, 30203, 31013, 32423, 36263, 36563, 38183, 39293, 72227, 74747, 77477, 94349, 94949, 1003001, 1055501, 1074701, 1085801, 1120211, 1123211, 1153511, 1178711, 1183811, 1221221, 1311131, 1317131, 1363631]

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

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