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 | 2 |
| 1 | 137 |
| 2 | 18771 |
| 3 | 2571764 |
| 4 | 352350439 |
| 5 | 48274581907 |
| 6 | 6613970071698 |
| 7 | 906162174404533 |
| 8 | 124150831863492719 |
| 9 | 17009570127472907036 |
| 10 | 2330435258295651756651 |
| 11 | 319286639956631763568223 |