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 | 12 |
| 2 | 144 |
| 3 | 1117 |
| 4 | 10621 |
| 5 | 98824 |
| 6 | 894720 |
| 7 | 8244759 |
| 8 | 75709453 |
| 9 | 694032466 |
| 10 | 6372084456 |
| 11 | 58477847273 |
| 12 | 536617596113 |
| 13 | 4924871267328 |
| 14 | 45196366353136 |
| 15 | 414774195476647 |
| 16 | 3806487479872457 |
| 17 | 34932921065290570 |
| 18 | 320586783126445036 |