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 | 6 |
| 1 | 36 |
| 2 | 246 |
| 3 | 1716 |
| 4 | 12006 |
| 5 | 84036 |
| 6 | 588246 |
| 7 | 4117716 |
| 8 | 28824006 |
| 9 | 201768036 |
| 10 | 1412376246 |
| 11 | 9886633716 |
| 12 | 69206436006 |
| 13 | 484445052036 |
| 14 | 3391115364246 |
| 15 | 23737807549716 |
| 16 | 166164652848006 |
| 17 | 1163152569936036 |
| 18 | 8142067989552246 |
| 19 | 56994475926865716 |