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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 16 |
| 5 | 31 |
| 6 | 52 |
| 7 | 80 |
| 8 | 133 |
| 9 | 197 |
| 10 | 298 |
| 11 | 428 |
| 12 | 621 |
| 13 | 879 |
| 14 | 1230 |
| 15 | 1696 |
| 16 | 2329 |
| 17 | 3142 |
| 18 | 4231 |
| 19 | 5619 |
| 20 | 7447 |
| 21 | 9781 |
| 22 | 12771 |
| 23 | 16553 |
| 24 | 21391 |
| 25 | 27440 |
| 26 | 35089 |
| 27 | 44600 |
| 28 | 56510 |
| 29 | 71232 |
| 30 | 89538 |
| 31 | 112011 |
| 32 | 139759 |
| 33 | 173679 |
| 34 | 215279 |
| 35 | 265840 |
| 36 | 327527 |
| 37 | 402162 |
| 38 | 492703 |
| 39 | 601830 |
| 40 | 733550 |
| 41 | 891634 |