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 | 3 |
| 2 | 6 |
| 3 | 12 |
| 4 | 24 |
| 5 | 48 |
| 6 | 98 |
| 7 | 199 |
| 8 | 400 |
| 9 | 800 |
| 10 | 1597 |
| 11 | 3188 |
| 12 | 6360 |
| 13 | 12679 |
| 14 | 25273 |
| 15 | 50376 |
| 16 | 100400 |
| 17 | 200077 |
| 18 | 398698 |
| 19 | 794502 |
| 20 | 1583212 |
| 21 | 3154828 |
| 22 | 6286514 |
| 23 | 12526942 |
| 24 | 24961994 |
| 25 | 49740765 |
| 26 | 99116372 |
| 27 | 197505241 |
| 28 | 393560803 |
| 29 | 784232662 |
| 30 | 1562708632 |
| 31 | 3113946596 |
| 32 | 6205036280 |