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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5042 |
| 3 | 114243 |
| 4 | 937444 |
| 5 | 4656965 |
| 6 | 17057046 |
| 7 | 50843527 |
| 8 | 130576328 |
| 9 | 299537289 |
| 10 | 628855930 |
| 11 | 1229215691 |
| 12 | 2265463212 |
| 13 | 3974443213 |
| 14 | 6686381534 |
| 15 | 10850138895 |
| 16 | 17062657936 |
| 17 | 26102926097 |
| 18 | 38970776898 |
| 19 | 56930852179 |
| 20 | 81562047860 |
| 21 | 114812765781 |
| 22 | 159062294182 |