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 | 239 |
| 2 | 57121 |
| 3 | 5425943 |
| 4 | 288823579 |
| 5 | 11992802966 |
| 6 | 478507693443 |
| 7 | 20229461153969 |
| 8 | 915762458891757 |
| 9 | 43206434381517063 |
| 10 | 2069374312587593444 |
| 11 | 99272303599050335774 |
| 12 | 4753191310090939188404 |
| 13 | 227274223415204231413155 |