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 | 10 |
| 2 | 29 |
| 3 | 69 |
| 4 | 153 |
| 5 | 329 |
| 6 | 697 |
| 7 | 1465 |
| 8 | 3065 |
| 9 | 6393 |
| 10 | 13305 |
| 11 | 27641 |
| 12 | 57337 |
| 13 | 118777 |
| 14 | 245753 |
| 15 | 507897 |
| 16 | 1048569 |
| 17 | 2162681 |
| 18 | 4456441 |
| 19 | 9175033 |
| 20 | 18874361 |
| 21 | 38797305 |
| 22 | 79691769 |
| 23 | 163577849 |
| 24 | 335544313 |
| 25 | 687865849 |
| 26 | 1409286137 |
| 27 | 2885681145 |
| 28 | 5905580025 |
| 29 | 12079595513 |
| 30 | 24696061945 |