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 | 255 |
| 1 | 3855 |
| 2 | 13107 |
| 3 | 21845 |
| 4 | 38505 |
| 5 | 197462 |
| 6 | 329059 |
| 7 | 591418 |
| 8 | 1118584 |
| 9 | 2167325 |
| 10 | 4265038 |
| 11 | 8460068 |
| 12 | 251658255 |
| 13 | 855638067 |
| 14 | 1426063445 |
| 15 | 2516582505 |
| 16 | 12935233622 |
| 17 | 21558722659 |
| 18 | 38755369018 |
| 19 | 73299656824 |
| 20 | 142035910685 |