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 | 4 |
| 3 | 7 |
| 4 | 13 |
| 5 | 24 |
| 6 | 45 |
| 7 | 86 |
| 8 | 162 |
| 9 | 305 |
| 10 | 576 |
| 11 | 1088 |
| 12 | 2054 |
| 13 | 3877 |
| 14 | 7321 |
| 15 | 13824 |
| 16 | 26102 |
| 17 | 49285 |
| 18 | 93059 |
| 19 | 175713 |
| 20 | 331776 |
| 21 | 626451 |
| 22 | 1182849 |
| 23 | 2233427 |
| 24 | 4217101 |
| 25 | 7962624 |
| 26 | 15034828 |
| 27 | 28388386 |
| 28 | 53602242 |
| 29 | 101210414 |
| 30 | 191102976 |