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 | 203 |
| 2 | 876 |
| 3 | 4012 |
| 4 | 17866 |
| 5 | 72028 |
| 6 | 256565 |
| 7 | 810470 |
| 8 | 2300949 |
| 9 | 5957407 |
| 10 | 14253254 |
| 11 | 31865787 |
| 12 | 67190359 |
| 13 | 134640766 |
| 14 | 258034213 |
| 15 | 475437305 |
| 16 | 845940194 |
| 17 | 1458930243 |
| 18 | 2446555288 |
| 19 | 4000200734 |
| 20 | 6391955256 |
| 21 | 10002207736 |
| 22 | 15354704197 |
| 23 | 23160598840 |