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 | 2 |
| 2 | 10 |
| 3 | 105 |
| 4 | 1264 |
| 5 | 13045 |
| 6 | 136063 |
| 7 | 1273961 |
| 8 | 11936399 |
| 9 | 95697853 |
| 10 | 800561388 |
| 11 | 5824237329 |
| 12 | 42821430074 |
| 13 | 277065391875 |