n | a(n) |
---|---|
-1 | 7 |
0 | 16 |
1 | 49 |
2 | 212 |
3 | 1158 |
4 | 7584 |
5 | 57720 |
6 | 499680 |
7 | 4843440 |
8 | 51932160 |
9 | 610001280 |
10 | 7787404800 |
11 | 107336275200 |
12 | 1588369305600 |
13 | 25113574886400 |
14 | 422465999155200 |
15 | 7533512034048000 |
16 | 141940206600192000 |
17 | 2817400117948416000 |
18 | 58760985871171584000 |
19 | 1284693905417674752000 |
[7,16,49,212,1158,7584,57720,499680,4843440, 51932160,610001280,7787404800,107336275200, 1588369305600,25113574886400,422465999155200, 7533512034048000,141940206600192000, 2817400117948416000,58760985871171584000, 1284693905417674752000] |