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 | 1 |
| 2 | 3 |
| 3 | 14 |
| 4 | 65 |
| 5 | 294 |
| 6 | 1302 |
| 7 | 5676 |
| 8 | 24453 |
| 9 | 104390 |
| 10 | 442442 |
| 11 | 1864356 |
| 12 | 7818538 |
| 13 | 32657884 |
| 14 | 135950700 |
| 15 | 564306840 |
| 16 | 2336457645 |
| 17 | 9652643910 |
| 18 | 39800950530 |
| 19 | 163830074100 |
| 20 | 673327275390 |
| 21 | 2763494696820 |
| 22 | 11327881630260 |
| 23 | 46381659765480 |
| 24 | 189711966348450 |
| 25 | 775232392541724 |
| 26 | 3165127107345252 |