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) |
|---|---|
| 3 | 1 |
| 4 | 4 |
| 5 | 25 |
| 6 | 24 |
| 7 | 521 |
| 8 | 160 |
| 9 | 10569 |
| 10 | 1088 |
| 11 | 213577 |
| 12 | 7424 |
| 13 | 4313673 |
| 14 | 50688 |
| 15 | 87118409 |
| 16 | 346112 |
| 17 | 1759416905 |
| 18 | 2363392 |
| 19 | 35532608073 |
| 20 | 16138240 |
| 21 | 717604819529 |
| 22 | 110198784 |
| 23 | 14492509704777 |
| 24 | 752484352 |
| 25 | 292685934269001 |
| 26 | 5138284544 |
| 27 | 5910988354523721 |
| 28 | 35086401536 |
| 29 | 119376366388154953 |