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 | 1 |
| 2 | 7 |
| 3 | 469 |
| 4 | 3367 |
| 5 | 226051 |
| 6 | 1622881 |
| 7 | 108956107 |
| 8 | 782225269 |
| 9 | 52516617517 |
| 10 | 377030956771 |
| 11 | 25312900687081 |
| 12 | 181728138938347 |
| 13 | 12200765614555519 |
| 14 | 87592585937326477 |
| 15 | 5880743713315073071 |
| 16 | 42219444693652423561 |
| 17 | 2834506269052250664697 |
| 18 | 20349684749754530829919 |