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 | 1089 |
| 2 | 9801 |
| 3 | 10036224 |
| 4 | 42263001 |
| 5 | 420578064 |
| 6 | 460875024 |
| 7 | 12303690084 |
| 8 | 48009630321 |
| 9 | 92158994929 |
| 10 | 92949985129 |
| 11 | 1212029250084 |
| 12 | 1230349042521 |
| 13 | 1234147690084 |
| 14 | 1252409430321 |
| 15 | 4800529202121 |
| 16 | 4800967414321 |
| 17 | 9488660854689 |
| 18 | 9864580668849 |
| 19 | 102230743690084 |
| 20 | 121200525010321 |