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 | 188 |
| 4 | 404 |
| 5 | 836 |
| 6 | 1700 |
| 7 | 3428 |
| 8 | 6884 |
| 9 | 13796 |
| 10 | 27620 |
| 11 | 55268 |
| 12 | 110564 |
| 13 | 221156 |
| 14 | 442340 |
| 15 | 884708 |
| 16 | 1769444 |
| 17 | 3538916 |
| 18 | 7077860 |
| 19 | 14155748 |
| 20 | 28311524 |
| 21 | 56623076 |
| 22 | 113246180 |
| 23 | 226492388 |
| 24 | 452984804 |
| 25 | 905969636 |
| 26 | 1811939300 |
| 27 | 3623878628 |
| 28 | 7247757284 |