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 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 9 |
| 5 | 10 |
| 6 | 23 |
| 7 | 28 |
| 8 | 29 |
| 9 | 84 |
| 10 | 170 |
| 11 | 353 |
| 12 | 805 |
| 13 | 850 |
| 14 | 2171 |
| 15 | 4860 |
| 16 | 11815 |
| 17 | 28025 |
| 18 | 31539 |
| 19 | 131252 |
| 20 | 318231 |
| 21 | 406904 |
| 22 | 1612758 |
| 23 | 2461032 |
| 24 | 9917597 |
| 25 | 11551434 |
| 26 | 36824781 |
| 27 | 80492173 |
| 28 | 206009383 |
| 29 | 505512671 |
| 30 | 1361256869 |
| 31 | 2467754261 |