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 | 66 |
| 3 | 816 |
| 4 | 10626 |
| 5 | 142506 |
| 6 | 1947792 |
| 7 | 26978328 |
| 8 | 377348994 |
| 9 | 5317936260 |
| 10 | 75394027566 |
| 11 | 1074082795968 |
| 12 | 15363284301456 |
| 13 | 220495674290430 |
| 14 | 3173734438530120 |
| 15 | 45795673964460816 |
| 16 | 662252084388541314 |