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 | -1 |
| 2 | 5 |
| 3 | 55 |
| 4 | 209 |
| 5 | 551 |
| 6 | 1189 |
| 7 | 2255 |
| 8 | 3905 |
| 9 | 6319 |
| 10 | 9701 |
| 11 | 14279 |
| 12 | 20305 |
| 13 | 28055 |
| 14 | 37829 |
| 15 | 49951 |
| 16 | 64769 |
| 17 | 82655 |
| 18 | 104005 |
| 19 | 129239 |
| 20 | 158801 |
| 21 | 193159 |
| 22 | 232805 |
| 23 | 278255 |
| 24 | 330049 |
| 25 | 388751 |
| 26 | 454949 |
| 27 | 529255 |
| 28 | 612305 |
| 29 | 704759 |
| 30 | 807301 |
| 31 | 920639 |
| 32 | 1045505 |
| 33 | 1182655 |