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 | 11 |
| 2 | 31 |
| 3 | 271 |
| 4 | 811 |
| 5 | 21871 |
| 6 | 196831 |
| 7 | 5314411 |
| 8 | 3874204891 |
| 9 | 313810596091 |
| 10 | 46383976865881019793281501678905914543189676980091 |
| 11 | 2738927449953408337773479392637715347860807235997334411 |