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 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 9 |
| 5 | 21 |
| 6 | 100 |
| 7 | 400 |
| 8 | 561 |
| 9 | 900 |
| 10 | 2100 |
| 11 | 8821 |
| 12 | 10000 |
| 13 | 11221 |
| 14 | 17821 |
| 15 | 40000 |
| 16 | 56100 |
| 17 | 73221 |
| 18 | 90000 |
| 19 | 210000 |
| 20 | 211201 |
| 21 | 518041 |
| 22 | 882100 |
| 23 | 1000000 |
| 24 | 1001614 |
| 25 | 1002621 |
| 26 | 1012021 |
| 27 | 1012224 |
| 28 | 1122100 |
| 29 | 1302801 |
| 30 | 1782100 |
| 31 | 4000000 |
| 32 | 5012214 |
| 33 | 5610000 |