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 | 50 |
| 2 | 984 |
| 3 | 9731 |
| 4 | 67585 |
| 5 | 376734 |
| 6 | 1801402 |
| 7 | 7655477 |
| 8 | 29502561 |
| 9 | 104437965 |
| 10 | 342818189 |
| 11 | 1051490221 |
| 12 | 3033475639 |
| 13 | 8279003183 |
| 14 | 21484969347 |
| 15 | 53256520053 |
| 16 | 126598758740 |
| 17 | 289630093258 |
| 18 | 639706047860 |
| 19 | 1367894672765 |
| 20 | 2838837855851 |
| 21 | 5730717831654 |