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A272757 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 72 |
| 3 | 288 |
| 4 | 2073600 |
| 5 | 33177600 |
| 6 | 561842749440 |
| 7 | 179789679820800 |
| 8 | 704200217922109440000 |
| 9 | 180275255788060016640000 |
| 10 | 1246394851358539387238350848000 |
| 11 | 6381541638955721662660356341760000 |
| 12 | 292214732887898713986916575925267070976000000 |
[1,2,72,288,2073600,33177600,561842749440, 179789679820800,704200217922109440000, 180275255788060016640000, 1246394851358539387238350848000, 6381541638955721662660356341760000, 292214732887898713986916575925267070976000000] |