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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.

A138975 Primes made up of only 3's and a 4 and at most two 2's.

Table of values

n a(n)
1 23
2 43
3 223
4 233
5 433
6 2333
7 3323
8 3343
9 3433
10 23333
11 32233
12 32323
13 33223
14 33343
15 232333
16 233323
17 323233
18 323333
19 333233
20 333323
21 333433
22 334333
23 343333
24 2332333
25 2333323
26 3223333
27 3233323
28 3233333
29 3332233
30 3333233
31 3333433
32 3433333

List of values

[23, 43, 223, 233, 433, 2333, 3323, 3343, 3433, 23333, 32233, 32323, 33223, 33343, 232333, 233323, 323233, 323333, 333233, 333323, 333433, 334333, 343333, 2332333, 2333323, 3223333, 3233323, 3233333, 3332233, 3333233, 3333433, 3433333]

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

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