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 | 6 |
| 5 | 4 |
| 6 | 1 |
| 7 | 27 |
| 8 | 66 |
| 9 | 29 |
| 10 | 1 |
| 11 | 108 |
| 12 | 780 |
| 13 | 1116 |
| 14 | 355 |
| 15 | 1 |
| 16 | 405 |
| 17 | 8020 |
| 18 | 29250 |
| 19 | 28405 |
| 20 | 6942 |
| 21 | 1 |
| 22 | 1458 |
| 23 | 76110 |
| 24 | 649260 |
| 25 | 1460425 |
| 26 | 1068576 |
| 27 | 209527 |