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 | 3 |
| 1 | 8 |
| 2 | 23 |
| 3 | 72 |
| 4 | 228 |
| 5 | 719 |
| 6 | 2274 |
| 7 | 7189 |
| 8 | 22733 |
| 9 | 71887 |
| 10 | 227327 |
| 11 | 718869 |
| 12 | 2273261 |
| 13 | 7188681 |
| 14 | 22732604 |
| 15 | 71886806 |
| 16 | 227326039 |
| 17 | 718868054 |
| 18 | 2273260386 |
| 19 | 7188680533 |
| 20 | 22732603855 |
| 21 | 71886805327 |
| 22 | 227326038545 |
| 23 | 718868053265 |
| 24 | 2273260385449 |
| 25 | 7188680532650 |
| 26 | 22732603854487 |
| 27 | 71886805326500 |