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 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 12 |
| 6 | 532 |
| 7 | 8781 |
| 8 | 952467 |
| 9 | 81388360 |
| 10 | 24626668920 |
| 11 | 14235727386501 |
| 12 | 14622615341736656 |
| 13 | 38187293105036003115 |
| 14 | 169994743921070851334774 |
| 15 | 1720618701132822565695718755 |