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 | 3 |
| 2 | 28 |
| 3 | 285 |
| 4 | 2874 |
| 5 | 29207 |
| 6 | 293858 |
| 7 | 2947737 |
| 8 | 29514646 |
| 9 | 295386007 |
| 10 | 2955097334 |
| 11 | 29553146265 |
| 12 | 295558787590 |
| 13 | 2955735778303 |
| 14 | 29557796658178 |
| 15 | 295579887348019 |
| 16 | 2955811931652374 |
| 17 | 29558179966812569 |
| 18 | 295582026870344468 |
| 19 | 2955821271264504051 |
| 20 | 29558218775337316364 |
| 21 | 295582213433030953645 |