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 | 3 |
| 2 | 9 |
| 3 | 111 |
| 4 | 8659 |
| 5 | 4220403 |
| 6 | 8594777715 |
| 7 | 70377477369459 |
| 8 | 2305913405481561715 |
| 9 | 302233760834929839713907 |
| 10 | 158456627262298939528655810163 |
| 11 | 332307157402856267706609817833582195 |