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 | 8 |
| 2 | 228 |
| 3 | 5096 |
| 4 | 120465 |
| 5 | 2810694 |
| 6 | 65805403 |
| 7 | 1539222016 |
| 8 | 36012826776 |
| 9 | 842518533590 |
| 10 | 19711134149599 |
| 11 | 461148537211748 |
| 12 | 10788744980331535 |
| 13 | 252406631116215534 |
| 14 | 5905146419664967132 |
| 15 | 138153075553825008696 |