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 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 34 |
| 5 | 269 |
| 6 | 2613 |
| 7 | 28893 |
| 8 | 359110 |
| 9 | 4934952 |
| 10 | 74342563 |
| 11 | 1217389949 |
| 12 | 21533211312 |
| 13 | 409230368646 |
| 14 | 8318041706593 |