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 | 8 |
| 4 | 32 |
| 5 | 123 |
| 6 | 523 |
| 7 | 2201 |
| 8 | 9443 |
| 9 | 40341 |
| 10 | 172649 |
| 11 | 736926 |
| 12 | 3141607 |
| 13 | 13367012 |
| 14 | 56790498 |
| 15 | 240919918 |
| 16 | 1020753475 |
| 17 | 4319803799 |
| 18 | 18262494912 |
| 19 | 77134873774 |
| 20 | 325518862387 |
| 21 | 1372679840360 |
| 22 | 5784417772262 |