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) |
|---|---|
| 0 | 1 |
| 1 | 56 |
| 2 | 1176 |
| 3 | 14112 |
| 4 | 116424 |
| 5 | 731808 |
| 6 | 3737448 |
| 7 | 16195608 |
| 8 | 61408347 |
| 9 | 208416208 |
| 10 | 644195552 |
| 11 | 1837984512 |
| 12 | 4892876352 |
| 13 | 12259074816 |
| 14 | 29115302688 |
| 15 | 65937597264 |
| 16 | 143107211709 |
| 17 | 298915373064 |
| 18 | 603074875480 |
| 19 | 1178943365600 |
| 20 | 2239226847000 |
| 21 | 4142127132000 |
| 22 | 7477931097000 |