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 | 56 |
| 2 | 176 |
| 3 | 792 |
| 4 | 2323520 |
| 5 | 4087968 |
| 6 | 8118264 |
| 7 | 92669720 |
| 8 | 118114304 |
| 9 | 150198136 |
| 10 | 384276336 |
| 11 | 541946240 |
| 12 | 1188908248 |
| 13 | 1844349560 |
| 14 | 2291320912 |
| 15 | 3163127352 |
| 16 | 4351078600 |
| 17 | 5371315400 |
| 18 | 5964539504 |
| 19 | 7346629512 |
| 20 | 10015581680 |
| 21 | 11097645016 |
| 22 | 16670689208 |
| 23 | 18440293320 |