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 | 15 |
| 3 | 99 |
| 4 | 794 |
| 5 | 7414 |
| 6 | 78507 |
| 7 | 926026 |
| 8 | 12010188 |
| 9 | 169580899 |
| 10 | 2586371577 |
| 11 | 42336163519 |
| 12 | 739814864633 |
| 13 | 13739211766050 |
| 14 | 270108101356162 |
| 15 | 5602446487013365 |
| 16 | 122232180232983149 |
| 17 | 2797753890784828302 |