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 | 3 |
| 2 | 8 |
| 3 | 17 |
| 4 | 44 |
| 5 | 125 |
| 6 | 368 |
| 7 | 1097 |
| 8 | 3284 |
| 9 | 9845 |
| 10 | 29528 |
| 11 | 88577 |
| 12 | 265724 |
| 13 | 797165 |
| 14 | 2391488 |
| 15 | 7174457 |
| 16 | 21523364 |
| 17 | 64570085 |
| 18 | 193710248 |
| 19 | 581130737 |
| 20 | 1743392204 |
| 21 | 5230176605 |
| 22 | 15690529808 |
| 23 | 47071589417 |
| 24 | 141214768244 |
| 25 | 423644304725 |
| 26 | 1270932914168 |
| 27 | 3812798742497 |
| 28 | 11438396227484 |