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) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 177 |
| 3 | 10199 |
| 4 | 1051745 |
| 5 | 169913511 |
| 6 | 39576670993 |
| 7 | 12555482177143 |
| 8 | 5204598491645121 |
| 9 | 2731249457298541895 |
| 10 | 1769824793166593577329 |
| 11 | 1387848700381793990412567 |
| 12 | 1295310886227493280950806817 |