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 | 2 |
| 3 | 4 |
| 4 | 12 |
| 5 | 92 |
| 6 | 6636 |
| 7 | 42839036 |
| 8 | 1834614576635532 |
| 9 | 3365810487617338033584723922844 |
| 10 | 11328680238554850474377984661704304183660014108982249765031212 |