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 | 17 |
| 2 | 197 |
| 3 | 2109 |
| 4 | 20185 |
| 5 | 176377 |
| 6 | 1395261 |
| 7 | 10248133 |
| 8 | 70554353 |
| 9 | 458690081 |
| 10 | 2839094517 |
| 11 | 16837397901 |
| 12 | 95964034121 |
| 13 | 526432799625 |
| 14 | 2784251496685 |
| 15 | 14233010034069 |
| 16 | 70491253578465 |
| 17 | 338968561343793 |
| 18 | 1585620669607461 |