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 | 1 |
| 2 | 13 |
| 3 | 109 |
| 4 | 2323 |
| 5 | 5045 |
| 6 | 155881 |
| 7 | 2788829 |
| 8 | 37828433 |
| 9 | 431455909 |
| 10 | 3116633995 |
| 11 | 9612440261 |
| 12 | 581311042303 |
| 13 | 4755044206841 |
| 14 | 111596541950239 |
| 15 | 4206025171313755 |
| 16 | 337970519351250133 |
| 17 | 343326090001007461 |