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 | 41 |
| 4 | 864 |
| 5 | 2469 |
| 6 | 20576 |
| 7 | 493827 |
| 8 | 7098637639 |
| 9 | 13717421 |
| 10 | 1234567891 |
| 11 | 82737383012865106529 |
| 12 | 10288065758426 |
| 13 | 3513762316247164732 |
| 14 | 563643651522439401227280 |
| 15 | 8230452606740808761 |