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 | 0 |
| 1 | 2 |
| 2 | 10 |
| 3 | 290 |
| 4 | 9802 |
| 5 | 332930 |
| 6 | 11309770 |
| 7 | 384199202 |
| 8 | 13051463050 |
| 9 | 443365544450 |
| 10 | 15061377048202 |
| 11 | 511643454094370 |
| 12 | 17380816062160330 |
| 13 | 590436102659356802 |
| 14 | 20057446674355970890 |
| 15 | 681362750825443653410 |
| 16 | 23146276081390728245002 |
| 17 | 786292024016459316676610 |