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) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 57 |
| 4 | 650 |
| 5 | 8184 |
| 6 | 109668 |
| 7 | 1533939 |
| 8 | 22137570 |
| 9 | 327203085 |
| 10 | 4928006512 |
| 11 | 75357373305 |
| 12 | 1166880131820 |
| 13 | 18259838103852 |
| 14 | 288308609783760 |
| 15 | 4587430875645660 |
| 16 | 73484989079268690 |
| 17 | 1184104656043939071 |