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 | 1 |
| 1 | 9 |
| 2 | 33 |
| 3 | 73 |
| 4 | 129 |
| 5 | 201 |
| 6 | 289 |
| 7 | 393 |
| 8 | 513 |
| 9 | 649 |
| 10 | 801 |
| 11 | 969 |
| 12 | 1153 |
| 13 | 1353 |
| 14 | 1569 |
| 15 | 1801 |
| 16 | 2049 |
| 17 | 2313 |
| 18 | 2593 |
| 19 | 2889 |
| 20 | 3201 |
| 21 | 3529 |
| 22 | 3873 |
| 23 | 4233 |
| 24 | 4609 |
| 25 | 5001 |
| 26 | 5409 |
| 27 | 5833 |
| 28 | 6273 |
| 29 | 6729 |
| 30 | 7201 |
| 31 | 7689 |
| 32 | 8193 |
| 33 | 8713 |
| 34 | 9249 |
| 35 | 9801 |
| 36 | 10369 |
| 37 | 10953 |
| 38 | 11553 |
| 39 | 12169 |
| 40 | 12801 |
| 41 | 13449 |
| 42 | 14113 |