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 | 27 |
| 2 | 79 |
| 3 | 183 |
| 4 | 491 |
| 5 | 1307 |
| 6 | 3583 |
| 7 | 9911 |
| 8 | 27715 |
| 9 | 78051 |
| 10 | 221159 |
| 11 | 629711 |
| 12 | 1800371 |
| 13 | 5165187 |
| 14 | 14862871 |
| 15 | 42878543 |
| 16 | 123982195 |
| 17 | 359207987 |
| 18 | 1042568407 |
| 19 | 3030781151 |
| 20 | 8823230131 |
| 21 | 25719643811 |
| 22 | 75061264951 |
| 23 | 219298798031 |
| 24 | 641338650427 |