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 | 6 |
| 2 | 81 |
| 3 | 1406 |
| 4 | 27636 |
| 5 | 585162 |
| 6 | 13019909 |
| 7 | 300138696 |
| 8 | 7105216833 |
| 9 | 171717015470 |
| 10 | 4219267597578 |
| 11 | 105085831400550 |
| 12 | 2647012241261856 |
| 13 | 67316157557021436 |
| 14 | 1726006087183713615 |
| 15 | 44570883175043934384 |
| 16 | 1158139943222389790715 |