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) |
|---|---|
| 2 | 2 |
| 3 | 3 |
| 4 | 9 |
| 5 | 23 |
| 6 | 62 |
| 7 | 171 |
| 8 | 482 |
| 9 | 1384 |
| 10 | 4036 |
| 11 | 11924 |
| 12 | 35619 |
| 13 | 107407 |
| 14 | 326521 |
| 15 | 999675 |
| 16 | 3079634 |
| 17 | 9539366 |
| 18 | 29693294 |
| 19 | 92831327 |
| 20 | 291366477 |
| 21 | 917765199 |
| 22 | 2900217452 |
| 23 | 9192097510 |
| 24 | 29213057684 |
| 25 | 93073003438 |
| 26 | 297215560553 |
| 27 | 951144390092 |
| 28 | 3049877146281 |
| 29 | 9797605279905 |