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.

A132288 Odd palindromes which are semiprimes with an even number of digits.

Table of values

n a(n)
1 33
2 55
3 77
4 1111
5 1441
6 1661
7 1991
8 3113
9 3223
10 3443
11 3883
12 7117
13 7447
14 7997
15 9119
16 9229
17 9449
18 100001
19 103301
20 104401
21 107701
22 113311
23 115511
24 116611
25 124421
26 125521
27 130031
28 136631
29 139931
30 146641
31 152251
32 157751
33 160061
34 163361
35 164461
36 169961
37 170071

List of values

[33, 55, 77, 1111, 1441, 1661, 1991, 3113, 3223, 3443, 3883, 7117, 7447, 7997, 9119, 9229, 9449, 100001, 103301, 104401, 107701, 113311, 115511, 116611, 124421, 125521, 130031, 136631, 139931, 146641, 152251, 157751, 160061, 163361, 164461, 169961, 170071]

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

Content is available under The OEIS End-User License Agreement.