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 | 25 |
| 2 | 582 |
| 3 | 17552 |
| 4 | 510748 |
| 5 | 14544801 |
| 6 | 418324402 |
| 7 | 12059066460 |
| 8 | 347095468871 |
| 9 | 9991360194005 |
| 10 | 287711413471266 |
| 11 | 8284928413145004 |
| 12 | 238566125657445992 |
| 13 | 6869701227384114007 |
| 14 | 197820645386511819554 |
| 15 | 5696463550662058123697 |