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.

A254753 Composite numbers with only prime proper prefixes and suffixes in base 10.

Table of values

n a(n)
1 22
2 25
3 27
4 32
5 33
6 35
7 52
8 55
9 57
10 72
11 75
12 77
13 237
14 297
15 537
16 597
17 713
18 717
19 737
20 2337
21 2397
22 2937
23 3113
24 3173
25 5937
26 5997
27 7197
28 7337
29 7397
30 29397
31 31373
32 37937
33 59397
34 73313

List of values

[22, 25, 27, 32, 33, 35, 52, 55, 57, 72, 75, 77, 237, 297, 537, 597, 713, 717, 737, 2337, 2397, 2937, 3113, 3173, 5937, 5997, 7197, 7337, 7397, 29397, 31373, 37937, 59397, 73313]

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

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