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 | 21 |
| 2 | 36 |
| 3 | 56 |
| 4 | 253 |
| 5 | 496 |
| 6 | 561 |
| 7 | 1771 |
| 8 | 2926 |
| 9 | 3655 |
| 10 | 5985 |
| 11 | 26335 |
| 12 | 2895621 |
| 13 | 2919736 |
| 14 | 6471003 |
| 15 | 21474181 |
| 16 | 48792381 |
| 17 | 346700278 |
| 18 | 402073903 |
| 19 | 1260501229261 |
| 20 | 12864662659597529 |