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 | 7 |
| 3 | 49 |
| 4 | 343 |
| 5 | 2401 |
| 6 | 9430 |
| 7 | 65810 |
| 8 | 480077 |
| 9 | 3637345 |
| 10 | 28502254 |
| 11 | 230271472 |
| 12 | 1913354190 |
| 13 | 16318251874 |
| 14 | 142611810220 |
| 15 | 1275372111383 |
| 16 | 11657396456231 |
| 17 | 108792892306605 |
| 18 | 1035708759921763 |
| 19 | 10049835806235885 |
| 20 | 99321845447658052 |