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 | 25 |
| 3 | 1849 |
| 4 | 36481 |
| 5 | 2666689 |
| 6 | 52606009 |
| 7 | 3845364121 |
| 8 | 75857828929 |
| 9 | 5545012396225 |
| 10 | 109386936710041 |
| 11 | 7995904029992761 |
| 12 | 157735886878050625 |
| 13 | 11530088066237165569 |
| 14 | 227455039491212291641 |
| 15 | 16626378995609962758169 |