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 | 15 |
| 2 | 175 |
| 3 | 2635 |
| 4 | 49075 |
| 5 | 976887 |
| 6 | 20349075 |
| 7 | 435970995 |
| 8 | 9536816575 |
| 9 | 211927736135 |
| 10 | 4768373047015 |
| 11 | 108372083629275 |
| 12 | 2483526896194175 |
| 13 | 57312158484825735 |
| 14 | 1330460821533203275 |
| 15 | 31044085821533856483 |
| 16 | 727595761432647754075 |
| 17 | 17119900268689323874095 |