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 | 0 |
| 1 | 1 |
| 2 | 384 |
| 3 | 13122 |
| 4 | 163840 |
| 5 | 1171875 |
| 6 | 5878656 |
| 7 | 23059204 |
| 8 | 75497472 |
| 9 | 215233605 |
| 10 | 550000000 |
| 11 | 1286153286 |
| 12 | 2794881024 |
| 13 | 5710115047 |
| 14 | 11068417920 |
| 15 | 20503125000 |
| 16 | 36507222016 |
| 17 | 62781816969 |
| 18 | 104689625472 |
| 19 | 169835630410 |
| 20 | 268800000000 |
| 21 | 416051452971 |
| 22 | 631072545664 |