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 | 59 |
| 2 | 1711 |
| 3 | 32509 |
| 4 | 455126 |
| 5 | 5006386 |
| 6 | 45057474 |
| 7 | 341149446 |
| 8 | 2217471399 |
| 9 | 12565671261 |
| 10 | 62828356305 |
| 11 | 279871768995 |
| 12 | 1119487075980 |
| 13 | 4047376351620 |
| 14 | 13298522298180 |
| 15 | 39895566894540 |
| 16 | 109712808959985 |
| 17 | 277508869722315 |
| 18 | 647520696018735 |
| 19 | 1397281501935165 |