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 | 6 |
| 4 | 26 |
| 5 | 162 |
| 6 | 1450 |
| 7 | 18626 |
| 8 | 343210 |
| 9 | 9069306 |
| 10 | 343611106 |
| 11 | 18662952122 |
| 12 | 1453016097506 |
| 13 | 162144482866166 |
| 14 | 25932885879826066 |