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 | 1 |
| 3 | 1 |
| 4 | 5 |
| 5 | 11 |
| 6 | 103 |
| 7 | 71 |
| 8 | 661 |
| 9 | 19099 |
| 10 | 329891 |
| 11 | 1 |
| 12 | 36846277 |
| 13 | 75024347 |
| 14 | 3790360487 |
| 15 | 22163972339 |
| 16 | 1230752346353 |
| 17 | 538105034941 |
| 18 | 336967037143579 |
| 19 | 1713311273363831 |
| 20 | 117876683047 |
| 21 | 1188161445853707907 |
| 22 | 48869596859895986087 |
| 23 | 550042909337978226383 |
| 24 | 765041185860961084291 |