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 | 16 |
| 2 | 63 |
| 3 | 216 |
| 4 | 715 |
| 5 | 2279 |
| 6 | 7102 |
| 7 | 21722 |
| 8 | 65558 |
| 9 | 195759 |
| 10 | 579465 |
| 11 | 1703072 |
| 12 | 4975222 |
| 13 | 14459492 |
| 14 | 41837580 |
| 15 | 120585504 |
| 16 | 346372172 |
| 17 | 991915208 |
| 18 | 2832896772 |
| 19 | 8071045528 |
| 20 | 22944211170 |