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 | 3 |
| 2 | 7 |
| 3 | 13 |
| 4 | 15 |
| 5 | 21 |
| 6 | 73 |
| 7 | 231 |
| 8 | 301 |
| 9 | 493 |
| 10 | 895 |
| 11 | 955 |
| 12 | 4069 |
| 13 | 5057 |
| 14 | 5415 |
| 15 | 15325 |
| 16 | 19845 |
| 17 | 21603 |
| 18 | 24577 |
| 19 | 37877 |
| 20 | 40193 |
| 21 | 44283 |