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 | 5 |
| 3 | 43 |
| 4 | 647 |
| 5 | 22049 |
| 6 | 1455385 |
| 7 | 218691097 |
| 8 | 72877697369 |
| 9 | 51489351108548 |
| 10 | 76986419992442614 |
| 11 | 244445556617038272066 |
| 12 | 1683765308911934025295376 |