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 | 4 |
| 3 | 9 |
| 4 | 49 |
| 5 | 169 |
| 6 | 289 |
| 7 | 1849 |
| 8 | 3969 |
| 9 | 6889 |
| 10 | 27889 |
| 11 | 69696 |
| 12 | 97969 |
| 13 | 499849 |
| 14 | 698896 |
| 15 | 2778889 |
| 16 | 4999696 |
| 17 | 9696996 |
| 18 | 19998784 |
| 19 | 46689889 |
| 20 | 66699889 |
| 21 | 79869969 |
| 22 | 277788889 |
| 23 | 478996996 |
| 24 | 876988996 |
| 25 | 1749999889 |
| 26 | 5599977889 |
| 27 | 7998976969 |
| 28 | 8998988769 |
| 29 | 17999978896 |