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 | 3 |
| 2 | 13 |
| 3 | 181 |
| 4 | 1281 |
| 5 | 32551 |
| 6 | 314245 |
| 7 | 11638089 |
| 8 | 141943681 |
| 9 | 6914792611 |
| 10 | 101829922701 |
| 11 | 6152865979261 |
| 12 | 106138316846017 |
| 13 | 7657555132292703 |
| 14 | 151395000617362741 |
| 15 | 12699162274678909201 |
| 16 | 283052059672669084161 |