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 | 2 |
| 2 | 5 |
| 3 | 11 |
| 4 | 37 |
| 5 | 107 |
| 6 | 337 |
| 7 | 1061 |
| 8 | 3343 |
| 9 | 10559 |
| 10 | 33343 |
| 11 | 105517 |
| 12 | 333337 |
| 13 | 1054133 |
| 14 | 3333373 |
| 15 | 10540931 |
| 16 | 33333359 |
| 17 | 105409309 |
| 18 | 333333361 |
| 19 | 1054092869 |
| 20 | 3333333413 |
| 21 | 10540925639 |
| 22 | 33333333343 |
| 23 | 105409255363 |
| 24 | 333333333367 |
| 25 | 1054092553583 |
| 26 | 3333333333383 |
| 27 | 10540925534207 |