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.
| n | a(n) |
|---|---|
| 1 | 41 |
| 2 | 43 |
| 3 | 241 |
| 4 | 401 |
| 5 | 421 |
| 6 | 431 |
| 7 | 433 |
| 8 | 443 |
| 9 | 1423 |
| 10 | 1433 |
| 11 | 2141 |
| 12 | 2143 |
| 13 | 2243 |
| 14 | 2341 |
| 15 | 2411 |
| 16 | 2423 |
| 17 | 2441 |
| 18 | 3041 |
| 19 | 3343 |
| 20 | 3413 |
| 21 | 3433 |
| 22 | 4001 |
| 23 | 4003 |
| 24 | 4013 |
| 25 | 4021 |
| 26 | 4111 |
| 27 | 4133 |
| 28 | 4201 |
| 29 | 4211 |
| 30 | 4231 |
| 31 | 4241 |
| 32 | 4243 |