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 | 497 |
| 3 | 71071 |
| 4 | 18107089 |
| 5 | 7216769351 |
| 6 | 4145592145057 |
| 7 | 3243346361740927 |
| 8 | 3315690551047089761 |
| 9 | 4291382388990897826759 |
| 10 | 6858633609184481948847121 |
| 11 | 13266034908146716343647359647 |
| 12 | 30540929340877940990799507474097 |