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 | 2 |
| 2 | 14 |
| 3 | 64 |
| 4 | 284 |
| 5 | 1206 |
| 6 | 4882 |
| 7 | 19060 |
| 8 | 72588 |
| 9 | 271548 |
| 10 | 1001964 |
| 11 | 3656480 |
| 12 | 13223348 |
| 13 | 47461350 |
| 14 | 169263658 |
| 15 | 600355808 |
| 16 | 2119297852 |
| 17 | 7450253362 |
| 18 | 26095036854 |
| 19 | 91102304600 |
| 20 | 317127751352 |
| 21 | 1101029901244 |
| 22 | 3813576283628 |
| 23 | 13180379580636 |
| 24 | 45463936339816 |