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) |
|---|---|
| 1 | 0 |
| 2 | 40 |
| 3 | 901 |
| 4 | 1077 |
| 5 | 1281 |
| 6 | 6160 |
| 7 | 7180 |
| 8 | 8364 |
| 9 | 36777 |
| 10 | 42721 |
| 11 | 49621 |
| 12 | 215220 |
| 13 | 249864 |
| 14 | 290080 |
| 15 | 1255261 |
| 16 | 1457181 |
| 17 | 1691577 |
| 18 | 7317064 |
| 19 | 8493940 |
| 20 | 9860100 |
| 21 | 42647841 |
| 22 | 49507177 |
| 23 | 57469741 |
| 24 | 248570700 |
| 25 | 288549840 |
| 26 | 334959064 |
| 27 | 1448777077 |
| 28 | 1681792581 |