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 | 0 |
| 2 | -1 |
| 3 | 1 |
| 4 | 7 |
| 5 | 3 |
| 6 | 27 |
| 7 | 43 |
| 8 | 75 |
| 9 | 139 |
| 10 | 11 |
| 11 | 779 |
| 12 | 267 |
| 13 | 1291 |
| 14 | 3339 |
| 15 | 7435 |
| 16 | 32011 |
| 17 | 48395 |
| 18 | 81163 |
| 19 | 146699 |
| 20 | 277771 |
| 21 | 15627 |
| 22 | 1588491 |
| 23 | 2637067 |
| 24 | 539915 |
| 25 | 4734219 |
| 26 | 13122827 |
| 27 | 63454475 |
| 28 | 29900043 |
| 29 | 231226635 |
| 30 | 97008907 |
| 31 | 902315275 |
| 32 | 365444363 |
| 33 | 1439186187 |
| 34 | 3586669835 |
| 35 | 7881637131 |