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 | 6 |
| 2 | 36 |
| 3 | 102 |
| 4 | 281 |
| 5 | 699 |
| 6 | 1799 |
| 7 | 4706 |
| 8 | 12161 |
| 9 | 31356 |
| 10 | 81206 |
| 11 | 210185 |
| 12 | 543399 |
| 13 | 1405547 |
| 14 | 3636320 |
| 15 | 9405751 |
| 16 | 24328772 |
| 17 | 62932300 |
| 18 | 162787659 |
| 19 | 421078225 |
| 20 | 1089199555 |
| 21 | 2817430618 |
| 22 | 7287821163 |
| 23 | 18851338264 |
| 24 | 48762622760 |
| 25 | 126133900375 |
| 26 | 326269518673 |