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 | 1 |
| 3 | 3 |
| 4 | 10 |
| 5 | 97 |
| 6 | 24851 |
| 7 | 510157381 |
| 8 | 695243618523592916 |
| 9 | 2521217027896573870788274798987969315 |
| 10 | 200759268273854851798439056384882383919258596635924900200845873520031055851 |