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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 26 |
| 5 | 97 |
| 6 | 624 |
| 7 | 4163 |
| 8 | 34470 |
| 9 | 314493 |
| 10 | 3202839 |
| 11 | 35704007 |
| 12 | 433460014 |
| 13 | 5687955737 |
| 14 | 80257406982 |
| 15 | 1211781910755 |
| 16 | 19496955286194 |
| 17 | 333041104402877 |
| 18 | 6019770408287089 |
| 19 | 114794574818830735 |
| 20 | 2303332664693034476 |
| 21 | 48509766592893402121 |
| 22 | 1069983257460254131272 |