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 | 9 |
| 2 | 34 |
| 3 | 114 |
| 4 | 350 |
| 5 | 996 |
| 6 | 2666 |
| 7 | 6810 |
| 8 | 16798 |
| 9 | 40368 |
| 10 | 95114 |
| 11 | 220710 |
| 12 | 505982 |
| 13 | 1148556 |
| 14 | 2585674 |
| 15 | 5779890 |
| 16 | 12840638 |
| 17 | 28371816 |
| 18 | 62384042 |