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 | 16 |
| 3 | 174 |
| 4 | 6510 |
| 5 | 516724 |
| 6 | 88819714 |
| 7 | 37849652838 |
| 8 | 36679559167444 |
| 9 | 82039130470188394 |
| 10 | 429029852979061855882 |
| 11 | 5194153238714571994969836 |
| 12 | 145816870651378340099973452074 |