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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 721 |
| 8 | 5761 |
| 9 | 25921 |
| 10 | 86401 |
| 11 | 237601 |
| 12 | 570241 |
| 13 | 1235521 |
| 14 | 892045441 |
| 15 | 13348249201 |
| 16 | 106757164801 |
| 17 | 604924594561 |
| 18 | 2722120577281 |
| 19 | 10344007402561 |
| 20 | 34479959558401 |
| 21 | 24928970490633601 |
| 22 | 546446134633639681 |
| 23 | 6281586217487489041 |
| 24 | 50248618811434961281 |