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) |
|---|---|
| 1 | 0 |
| 2 | 8 |
| 3 | 14 |
| 4 | 207 |
| 5 | 1874 |
| 6 | 20205 |
| 7 | 205020 |
| 8 | 2141384 |
| 9 | 22238670 |
| 10 | 232041425 |
| 11 | 2420128480 |
| 12 | 25258683242 |
| 13 | 263607333975 |
| 14 | 2751296309311 |
| 15 | 28715052573470 |
| 16 | 299699771800630 |
| 17 | 3127972672911502 |
| 18 | 32646796609958085 |
| 19 | 340736340129916559 |