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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 10 |
| 5 | 23 |
| 6 | 64 |
| 7 | 179 |
| 8 | 514 |
| 9 | 1685 |
| 10 | 5940 |
| 11 | 20676 |
| 12 | 79319 |
| 13 | 334819 |
| 14 | 1373858 |
| 15 | 6075215 |
| 16 | 29763791 |
| 17 | 140830911 |
| 18 | 707344776 |
| 19 | 3937348498 |
| 20 | 21115879847 |
| 21 | 118932148555 |
| 22 | 740523625011 |
| 23 | 4440207749039 |
| 24 | 27742486678915 |
| 25 | 190912973144330 |