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 | 1009 |
| 2 | 72577 |
| 3 | 7983361 |
| 4 | 17435658241 |
| 5 | 24329020081766401 |
| 6 | 5170403347776995328001 |
| 7 | 23924444173096038912392632299131543012876746752000000001 |