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 | 3 |
| 3 | 4782971 |
| 4 | 1801088543 |
| 5 | 1174711139839 |
| 6 | 3938980639169 |
| 7 | 93206534790701 |
| 8 | 425927596977749 |
| 9 | 1107984764452583 |
| 10 | 2149422977421877 |
| 11 | 7416552901015627 |
| 12 | 19891027786401119 |
| 13 | 307732862434921877 |
| 14 | 830512886046548069 |
| 15 | 1042842864990234377 |
| 16 | 3678954248903875651 |