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 | 13 |
| 2 | 169 |
| 3 | 312 |
| 4 | 576 |
| 5 | 1872 |
| 6 | 6084 |
| 7 | 18564 |
| 8 | 56644 |
| 9 | 177548 |
| 10 | 556516 |
| 11 | 1724752 |
| 12 | 5345344 |
| 13 | 16678768 |
| 14 | 52041796 |
| 15 | 161651312 |
| 16 | 502118464 |
| 17 | 1565288432 |
| 18 | 4879581316 |
| 19 | 15166141648 |
| 20 | 47137620544 |
| 21 | 146886255152 |
| 22 | 457714490116 |
| 23 | 1423079330608 |
| 24 | 4424493488704 |