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) |
|---|---|
| 3 | 4 |
| 4 | 52 |
| 5 | 292 |
| 6 | 1092 |
| 7 | 3192 |
| 8 | 7896 |
| 9 | 17304 |
| 10 | 34584 |
| 11 | 64284 |
| 12 | 112684 |
| 13 | 188188 |
| 14 | 301756 |
| 15 | 467376 |
| 16 | 702576 |
| 17 | 1028976 |
| 18 | 1472880 |
| 19 | 2065908 |
| 20 | 2845668 |
| 21 | 3856468 |
| 22 | 5150068 |
| 23 | 6786472 |
| 24 | 8834760 |
| 25 | 11373960 |
| 26 | 14493960 |
| 27 | 18296460 |
| 28 | 22895964 |
| 29 | 28420812 |
| 30 | 35014252 |