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 | 10 |
| 2 | 100 |
| 3 | 350 |
| 4 | 1271 |
| 5 | 5348 |
| 6 | 19319 |
| 7 | 65955 |
| 8 | 232892 |
| 9 | 806886 |
| 10 | 2731598 |
| 11 | 9282799 |
| 12 | 31515158 |
| 13 | 106316099 |
| 14 | 358441563 |
| 15 | 1208892830 |
| 16 | 4071575656 |
| 17 | 13706136778 |
| 18 | 46144638323 |
| 19 | 155319797404 |
| 20 | 522698327881 |
| 21 | 1759064945909 |
| 22 | 5919715175612 |
| 23 | 19920381011276 |