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 | 3 |
| 2 | 8 |
| 3 | 16 |
| 4 | 39 |
| 5 | 77 |
| 6 | 179 |
| 7 | 354 |
| 8 | 799 |
| 9 | 1584 |
| 10 | 3504 |
| 11 | 6960 |
| 12 | 15174 |
| 13 | 30183 |
| 14 | 65085 |
| 15 | 129598 |
| 16 | 277071 |
| 17 | 552140 |
| 18 | 1172348 |
| 19 | 2337624 |
| 20 | 4935586 |
| 21 | 9845978 |
| 22 | 20691318 |
| 23 | 41292196 |
| 24 | 86432614 |
| 25 | 172538352 |
| 26 | 359934704 |
| 27 | 718680768 |
| 28 | 1494861996 |
| 29 | 2985378027 |