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 | 239 |
| 2 | 9503 |
| 3 | 165212 |
| 4 | 1727738 |
| 5 | 12741432 |
| 6 | 72710554 |
| 7 | 340780382 |
| 8 | 1366188661 |
| 9 | 4823267213 |
| 10 | 15322738603 |
| 11 | 44529268480 |
| 12 | 119909493132 |
| 13 | 302279622352 |
| 14 | 719306742780 |
| 15 | 1626780581324 |
| 16 | 3516536949577 |
| 17 | 7300336446323 |
| 18 | 14614022023815 |