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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 16 |
| 7 | 26 |
| 8 | 46 |
| 9 | 88 |
| 10 | 174 |
| 11 | 342 |
| 12 | 660 |
| 13 | 1258 |
| 14 | 2398 |
| 15 | 4616 |
| 16 | 8998 |
| 17 | 17710 |
| 18 | 35028 |
| 19 | 69378 |
| 20 | 137430 |
| 21 | 272344 |
| 22 | 540334 |
| 23 | 1073798 |
| 24 | 2137396 |
| 25 | 4259770 |
| 26 | 8496366 |
| 27 | 16954536 |
| 28 | 33843606 |
| 29 | 67575358 |
| 30 | 134965204 |