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 | 2 |
| 4 | 7 |
| 5 | 5 |
| 6 | 6 |
| 7 | 48 |
| 8 | 91 |
| 9 | 49 |
| 10 | 24 |
| 11 | 360 |
| 12 | 1304 |
| 13 | 1697 |
| 14 | 729 |
| 15 | 120 |
| 16 | 3000 |
| 17 | 17910 |
| 18 | 41440 |
| 19 | 41051 |
| 20 | 14641 |
| 21 | 720 |
| 22 | 27720 |
| 23 | 249900 |
| 24 | 899730 |
| 25 | 1524282 |
| 26 | 1218745 |
| 27 | 371293 |