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 | 99 |
| 2 | 4851 |
| 3 | 156849 |
| 4 | 3764376 |
| 5 | 71523144 |
| 6 | 1120529256 |
| 7 | 14887031544 |
| 8 | 171200862756 |
| 9 | 1731030945644 |
| 10 | 15579278510796 |
| 11 | 126050526132804 |
| 12 | 924370524973896 |
| 13 | 6186171974825304 |
| 14 | 38000770702498296 |
| 15 | 215337700647490344 |
| 16 | 1130522928399324306 |
| 17 | 5519611944537877494 |