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 | 5 |
| 3 | 11 |
| 4 | 29 |
| 5 | 419 |
| 6 | 521 |
| 7 | 1931 |
| 8 | 6449 |
| 9 | 10007 |
| 10 | 28349 |
| 11 | 107507 |
| 12 | 173429 |
| 13 | 569321 |
| 14 | 913637 |
| 15 | 1349531 |
| 16 | 3593201 |
| 17 | 18286391 |
| 18 | 80528741 |
| 19 | 83528411 |
| 20 | 591792347 |
| 21 | 1971409091 |
| 22 | 2061246347 |
| 23 | 8579208791 |
| 24 | 13861166687 |
| 25 | 15250041281 |
| 26 | 27034148369 |
| 27 | 27066034997 |
| 28 | 54125499299 |
| 29 | 315361055237 |