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 | 31417 |
| 2 | 130561 |
| 3 | 41541241 |
| 4 | 208969201 |
| 5 | 224074369 |
| 6 | 392099401 |
| 7 | 851934601 |
| 8 | 5186365801 |
| 9 | 33847795741 |
| 10 | 65096562721 |
| 11 | 91625968981 |
| 12 | 104070261901 |
| 13 | 111794455501 |
| 14 | 165814673473 |
| 15 | 180007280041 |
| 16 | 184020124201 |
| 17 | 276032114281 |
| 18 | 408164260141 |
| 19 | 620052300421 |
| 20 | 1240013784241 |
| 21 | 1244667503017 |