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) |
|---|---|
| 0 | 3 |
| 1 | 16 |
| 2 | 94 |
| 3 | 586 |
| 4 | 3778 |
| 5 | 24826 |
| 6 | 165034 |
| 7 | 1105666 |
| 8 | 7450978 |
| 9 | 50450986 |
| 10 | 343000474 |
| 11 | 2340300946 |
| 12 | 16018600978 |
| 13 | 109951298746 |
| 14 | 756592019914 |
| 15 | 5217760843426 |
| 16 | 36054083523778 |
| 17 | 249557302572106 |
| 18 | 1729973941999354 |
| 19 | 12008256087645106 |