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 | 13 |
| 2 | 79 |
| 3 | 4057 |
| 4 | 36037 |
| 5 | 222379 |
| 6 | 973597 |
| 7 | 1310611 |
| 8 | 2070433 |
| 9 | 4381183 |
| 10 | 4905427 |
| 11 | 8145943651 |
| 12 | 21843304081 |
| 13 | 66988402183 |