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 | 121 |
| 3 | 1 |
| 4 | 676 |
| 5 | 1 |
| 6 | 91204 |
| 7 | 3249 |
| 8 | 1 |
| 9 | 1418481 |
| 10 | 14400 |
| 11 | 1 |
| 12 | 243953161 |
| 13 | 18429849 |
| 14 | 61009 |
| 15 | 1 |
| 16 | 7785238756 |
| 17 | 213393664 |
| 18 | 252004 |
| 19 | 1 |
| 20 | 1717027605316 |
| 21 | 207199756864 |
| 22 | 2288665600 |
| 23 | 1026169 |
| 24 | 1 |
| 25 | 94830864276996 |
| 26 | 4855359366144 |
| 27 | 23298053769 |
| 28 | 4145296 |
| 29 | 1 |