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 | 3 |
| 2 | 26 |
| 3 | 339 |
| 4 | 4070 |
| 5 | 55213 |
| 6 | 632418 |
| 7 | 7133747 |
| 8 | 82051293 |
| 9 | 1041785731 |
| 10 | 12182327373 |
| 11 | 137771632675 |
| 12 | 1525041000685 |