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 | 4 |
| 2 | 9 |
| 3 | 18 |
| 4 | 49 |
| 5 | 98 |
| 6 | 121 |
| 7 | 242 |
| 8 | 529 |
| 9 | 961 |
| 10 | 1058 |
| 11 | 1849 |
| 12 | 1922 |
| 13 | 2209 |
| 14 | 3481 |
| 15 | 3698 |
| 16 | 4418 |
| 17 | 4489 |
| 18 | 5041 |
| 19 | 6241 |
| 20 | 6889 |
| 21 | 6962 |
| 22 | 8978 |
| 23 | 10082 |
| 24 | 10609 |
| 25 | 11449 |
| 26 | 12482 |
| 27 | 13778 |
| 28 | 17161 |
| 29 | 19321 |
| 30 | 21218 |
| 31 | 22898 |
| 32 | 27889 |
| 33 | 32041 |
| 34 | 34322 |
| 35 | 36481 |
| 36 | 38642 |
| 37 | 44521 |
| 38 | 49729 |
| 39 | 51529 |
| 40 | 55778 |
| 41 | 57121 |
| 42 | 64082 |
| 43 | 69169 |