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 | 3 |
| 3 | 27 |
| 4 | 432 |
| 5 | 10125 |
| 6 | 314928 |
| 7 | 12252303 |
| 8 | 573308928 |
| 9 | 31381059609 |
| 10 | 1968300000000 |
| 11 | 139234453205859 |
| 12 | 10968475320188928 |
| 13 | 952427511967417317 |
| 14 | 90388408459919044608 |
| 15 | 9308590679915771484375 |
| 16 | 1033947715493982426365952 |
| 17 | 123217926482311669202664753 |
| 18 | 15682720840457750419215679488 |