n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 64 |
3 | 1920 |
4 | 86464 |
5 | 5304320 |
6 | 418131456 |
7 | 40727959552 |
8 | 4765747597312 |
9 | 655794545577984 |
10 | 104360850604687360 |
11 | 18948720298674028544 |
12 | 3882059495694122090496 |
13 | 889053986706845142876160 |
14 | 225799026538694916941283328 |
15 | 63163063632830911303738982400 |
16 | 19344290761718462120859544846336 |
17 | 6452149866509553556278434299117568 |
18 | 2332867461867950308492384248149311488 |
19 | 910538103145382496893587688740637114368 |
20 | 382208425560563535419125500691963382333440 |
[1,4,64,1920,86464,5304320,418131456,40727959552, 4765747597312,655794545577984,104360850604687360, 18948720298674028544,3882059495694122090496, 889053986706845142876160, 225799026538694916941283328, 63163063632830911303738982400, 19344290761718462120859544846336, 6452149866509553556278434299117568, 2332867461867950308492384248149311488, 910538103145382496893587688740637114368, 382208425560563535419125500691963382333440] |