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 | 15 |
| 2 | 225 |
| 3 | 2661 |
| 4 | 28541 |
| 5 | 297859 |
| 6 | 3094127 |
| 7 | 32148473 |
| 8 | 334179881 |
| 9 | 3474343713 |
| 10 | 36122604265 |
| 11 | 375565139165 |
| 12 | 3904724751131 |
| 13 | 40597113853797 |
| 14 | 422084894246843 |
| 15 | 4388382334042279 |
| 16 | 45625654988950821 |
| 17 | 474366234758987515 |