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 | 7 |
| 2 | 337 |
| 3 | 1627 |
| 4 | 57427 |
| 5 | 192637 |
| 6 | 776257 |
| 7 | 15328637 |
| 8 | 70275277 |
| 9 | 244650317 |
| 10 | 452942827 |
| 11 | 452942827 |
| 12 | 73712513057 |
| 13 | 319931193737 |
| 14 | 2618698284817 |
| 15 | 10993283241587 |
| 16 | 54010894438097 |
| 17 | 101684513099627 |
| 18 | 196948379177587 |