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 | 15 |
| 2 | 95 |
| 3 | 305 |
| 4 | 1795 |
| 5 | 2366 |
| 6 | 12740 |
| 7 | 105080 |
| 8 | 193060 |
| 9 | 231560 |
| 10 | 446995 |
| 11 | 2422980 |
| 12 | 4753420 |
| 13 | 5490660 |
| 14 | 8205340 |
| 15 | 30594200 |
| 16 | 137606920 |
| 17 | 138532800 |
| 18 | 350464520 |