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 | 6 |
| 2 | 36 |
| 3 | 82 |
| 4 | 177 |
| 5 | 408 |
| 6 | 942 |
| 7 | 2233 |
| 8 | 5348 |
| 9 | 12994 |
| 10 | 31873 |
| 11 | 78920 |
| 12 | 196862 |
| 13 | 494329 |
| 14 | 1248164 |
| 15 | 3166802 |
| 16 | 8067793 |
| 17 | 20626904 |
| 18 | 52898478 |
| 19 | 136020345 |
| 20 | 350558596 |
| 21 | 905277122 |
| 22 | 2341815073 |
| 23 | 6067027656 |
| 24 | 15738638142 |
| 25 | 40874569785 |
| 26 | 106260279044 |
| 27 | 276481264786 |