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 | 2 |
| 2 | 11 |
| 3 | 101 |
| 4 | 1305 |
| 5 | 21745 |
| 6 | 443329 |
| 7 | 10679494 |
| 8 | 296547736 |
| 9 | 9319259500 |
| 10 | 326788327650 |
| 11 | 12643827604842 |
| 12 | 534889691765631 |
| 13 | 24555735428777265 |
| 14 | 1215611513578215355 |
| 15 | 64542477563559758310 |
| 16 | 3658333757447085090365 |