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 | 1 |
| 1 | 4 |
| 2 | 36 |
| 3 | 355 |
| 4 | 3549 |
| 5 | 35495 |
| 6 | 354942 |
| 7 | 3549413 |
| 8 | 35494123 |
| 9 | 354941215 |
| 10 | 3549412151 |
| 11 | 35494121507 |
| 12 | 354941215066 |
| 13 | 3549412150655 |
| 14 | 35494121506548 |
| 15 | 354941215065477 |
| 16 | 3549412150654758 |
| 17 | 35494121506547571 |
| 18 | 354941215065475694 |
| 19 | 3549412150654756948 |