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 | 32 |
| 2 | 145 |
| 3 | 1649 |
| 4 | 18785 |
| 5 | 4208945 |
| 6 | 67137425 |
| 7 | 17179952705 |
| 8 | 274878037265 |
| 9 | 70368744457505 |
| 10 | 288230376152419025 |
| 11 | 4611686018428311425 |
| 12 | 18889465931478582728945 |
| 13 | 4835703278458516701650465 |