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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 12 |
| 4 | 79 |
| 5 | 722 |
| 6 | 8675 |
| 7 | 128177 |
| 8 | 2248873 |
| 9 | 45644104 |
| 10 | 1051632553 |
| 11 | 27107038863 |
| 12 | 772751427746 |
| 13 | 24136897360750 |
| 14 | 819689757351091 |
| 15 | 30068876227952332 |
| 16 | 1184869328943005936 |
| 17 | 49914047187427191742 |