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) |
|---|---|
| 2 | 81 |
| 3 | 1620 |
| 4 | 24300 |
| 5 | 324000 |
| 6 | 4050000 |
| 7 | 48600000 |
| 8 | 567000000 |
| 9 | 6480000000 |
| 10 | 72900000000 |
| 11 | 810000000000 |
| 12 | 8910000000000 |
| 13 | 97200000000000 |
| 14 | 1053000000000000 |
| 15 | 11340000000000000 |
| 16 | 121500000000000000 |
| 17 | 1296000000000000000 |