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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 10 |
| 6 | 22 |
| 7 | 42 |
| 8 | 82 |
| 9 | 157 |
| 10 | 304 |
| 11 | 589 |
| 12 | 1124 |
| 13 | 2186 |
| 14 | 4192 |
| 15 | 8110 |
| 16 | 15658 |
| 17 | 30253 |
| 18 | 58546 |
| 19 | 113307 |
| 20 | 219759 |
| 21 | 426180 |
| 22 | 827702 |
| 23 | 1608668 |
| 24 | 3129211 |
| 25 | 6091437 |
| 26 | 11868599 |
| 27 | 23140878 |
| 28 | 45150717 |
| 29 | 88157689 |
| 30 | 172235073 |
| 31 | 336717854 |
| 32 | 658662065 |
| 33 | 1289149627 |
| 34 | 2524532330 |