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 | 4 |
| 4 | 14 |
| 5 | 47 |
| 6 | 201 |
| 7 | 1331 |
| 8 | 11644 |
| 9 | 101575 |
| 10 | 1079100 |
| 11 | 11958564 |
| 12 | 169047968 |
| 13 | 2375578880 |
| 14 | 39413148160 |
| 15 | 962468127744 |
| 16 | 18758145972224 |