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 | 9 |
| 2 | 81 |
| 3 | 289 |
| 4 | 841 |
| 5 | 2209 |
| 6 | 5041 |
| 7 | 11025 |
| 8 | 22801 |
| 9 | 45369 |
| 10 | 88209 |
| 11 | 167281 |
| 12 | 312481 |
| 13 | 576081 |
| 14 | 1050625 |
| 15 | 1901641 |
| 16 | 3418801 |
| 17 | 6115729 |
| 18 | 10896601 |
| 19 | 19351201 |
| 20 | 34281025 |
| 21 | 60606225 |
| 22 | 106977649 |
| 23 | 188595289 |
| 24 | 332150625 |
| 25 | 584527329 |
| 26 | 1028035969 |
| 27 | 1807185121 |