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 | 37 |
| 2 | 145 |
| 3 | 1009 |
| 4 | 42661 |
| 5 | 413893 |
| 6 | 7914829 |
| 7 | 281951533 |
| 8 | 7901300449 |
| 9 | 257187953521 |