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 | 3 |
| 3 | 34 |
| 4 | 1385 |
| 5 | 151416 |
| 6 | 34988647 |
| 7 | 14652451360 |
| 8 | 10043767063521 |
| 9 | 10488938037348736 |
| 10 | 15823297170233169371 |
| 11 | 33093543421485325857024 |
| 12 | 92866643063435821361785225 |
| 13 | 340452463858281665211769947136 |
| 14 | 1594758692956372710911812262365695 |
| 15 | 9367635873493885183992990317902544896 |