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 | 9 |
| 2 | 73 |
| 3 | 623 |
| 4 | 5319 |
| 5 | 45418 |
| 6 | 387853 |
| 7 | 3312154 |
| 8 | 28284913 |
| 9 | 241545634 |
| 10 | 2062735515 |
| 11 | 17615213066 |
| 12 | 150429237854 |
| 13 | 1284625710592 |
| 14 | 10970362144063 |
| 15 | 93683977036771 |
| 16 | 800036264817078 |
| 17 | 6832097070038331 |
| 18 | 58344293161634134 |
| 19 | 498244757010106386 |