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 | 512 |
| 2 | 1408 |
| 3 | 4184 |
| 4 | 12549 |
| 5 | 35540 |
| 6 | 98676 |
| 7 | 281136 |
| 8 | 819453 |
| 9 | 2358888 |
| 10 | 6678576 |
| 11 | 18944656 |
| 12 | 54386801 |
| 13 | 156395364 |
| 14 | 446683118 |
| 15 | 1271579860 |
| 16 | 3632749828 |
| 17 | 10409795664 |
| 18 | 29790138680 |
| 19 | 85049570304 |
| 20 | 242860722210 |
| 21 | 694569186912 |
| 22 | 1987109647472 |