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 | 1 |
| 3 | 8 |
| 4 | 44 |
| 5 | 348 |
| 6 | 3946 |
| 7 | 52524 |
| 8 | 1041936 |
| 9 | 22648272 |
| 10 | 828481536 |
| 11 | 26112652416 |
| 12 | 1017144989568 |
| 13 | 50591916092160 |