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 | 36 |
| 2 | 81 |
| 3 | 1089 |
| 4 | 4356 |
| 5 | 9801 |
| 6 | 110889 |
| 7 | 443556 |
| 8 | 998001 |
| 9 | 11108889 |
| 10 | 44435556 |
| 11 | 99980001 |
| 12 | 1111088889 |
| 13 | 4444355556 |
| 14 | 9999800001 |
| 15 | 111110888889 |
| 16 | 444443555556 |
| 17 | 999998000001 |
| 18 | 11111108888889 |
| 19 | 44444435555556 |
| 20 | 99999980000001 |