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) |
|---|---|
| 13 | 1 |
| 14 | 3 |
| 15 | 12 |
| 16 | 33 |
| 17 | 114 |
| 18 | 403 |
| 19 | 1618 |
| 20 | 8946 |
| 21 | 45917 |
| 22 | 189428 |
| 23 | 979841 |
| 24 | 5497818 |
| 25 | 31708309 |
| 26 | 178006222 |
| 27 | 1091681487 |
| 28 | 6207647636 |
| 29 | 32636979255 |
| 30 | 184162388392 |
| 31 | 1069147827024 |
| 32 | 6446977283374 |