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 | 1 |
| 1 | 0 |
| 2 | 5 |
| 3 | 8 |
| 4 | 37 |
| 5 | 136 |
| 6 | 545 |
| 7 | 2376 |
| 8 | 10534 |
| 9 | 46824 |
| 10 | 212926 |
| 11 | 961552 |
| 12 | 4374949 |
| 13 | 19888832 |
| 14 | 90570555 |
| 15 | 412561096 |
| 16 | 1880381253 |
| 17 | 8572076760 |
| 18 | 39086502817 |
| 19 | 178240531672 |
| 20 | 812868845530 |
| 21 | 3707227380920 |
| 22 | 16907856403612 |
| 23 | 77113848855920 |
| 24 | 351705509804137 |
| 25 | 1604084309231360 |