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 | 1 |
| 2 | 1 |
| 3 | 11 |
| 4 | 120 |
| 5 | 122 |
| 6 | 1331 |
| 7 | 1462 |
| 8 | 15960 |
| 9 | 17413 |
| 10 | 190081 |
| 11 | 207503 |
| 12 | 2265120 |
| 13 | 2472614 |
| 14 | 26991251 |
| 15 | 29463874 |
| 16 | 321630000 |
| 17 | 351093865 |
| 18 | 3832568641 |
| 19 | 4183662515 |
| 20 | 45669193800 |
| 21 | 49852856306 |
| 22 | 544197756851 |
| 23 | 594050613166 |
| 24 | 6484703888520 |
| 25 | 7078754501677 |
| 26 | 77272248905281 |