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 | 2 |
| 2 | 7 |
| 3 | 13 |
| 4 | 87517 |
| 5 | 2891668030768721 |
| 6 | 70625274624238913 |
| 7 | 103865292721379353050549556815505213549 |
| 8 | 8541928234907492663056090579782886424256601 |