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 | 1 |
| 2 | 2 |
| 3 | 8 |
| 4 | 27 |
| 5 | 105 |
| 6 | 492 |
| 7 | 2584 |
| 8 | 14893 |
| 9 | 93625 |
| 10 | 637342 |
| 11 | 4663856 |
| 12 | 36455959 |
| 13 | 302825585 |
| 14 | 2661650680 |
| 15 | 24662914640 |
| 16 | 240141823417 |
| 17 | 2450053360913 |
| 18 | 26125165902810 |
| 19 | 290487741343352 |
| 20 | 3361177509359859 |
| 21 | 40396577112990745 |
| 22 | 503447944487902244 |
| 23 | 6496090993661295784 |
| 24 | 86660903426459105701 |