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 | 11 |
| 2 | 79 |
| 3 | 491 |
| 4 | 3479 |
| 5 | 25161 |
| 6 | 185353 |
| 7 | 1377877 |
| 8 | 10296415 |
| 9 | 77159957 |
| 10 | 579124519 |
| 11 | 4350292705 |
| 12 | 32693711237 |
| 13 | 245763900549 |
| 14 | 1847696428671 |
| 15 | 13892325835221 |
| 16 | 104456760543551 |
| 17 | 785430024706513 |
| 18 | 5905865012106589 |
| 19 | 44408109269422365 |