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 | 105 |
| 3 | 1320 |
| 4 | 16006 |
| 5 | 320168 |
| 6 | 5511367 |
| 7 | 91376524 |
| 8 | 1587468720 |
| 9 | 27421636815 |
| 10 | 470544728613 |
| 11 | 8106158053425 |
| 12 | 139669854334501 |
| 13 | 2404648275368779 |
| 14 | 41411751712923850 |
| 15 | 713227235336676149 |
| 16 | 12282835762563772060 |