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) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 45 |
| 3 | 526 |
| 4 | 7585 |
| 5 | 130371 |
| 6 | 2602285 |
| 7 | 59142588 |
| 8 | 1507308129 |
| 9 | 42563286145 |
| 10 | 1318792866941 |
| 11 | 44477806954890 |
| 12 | 1621859437812289 |
| 13 | 63576780042697663 |
| 14 | 2665971232476845805 |
| 15 | 119073945060707737336 |
| 16 | 5643402849491554535745 |