n | a(n) |
---|---|
2 | 1 |
3 | 20 |
4 | 307 |
5 | 4280 |
6 | 56914 |
7 | 736568 |
8 | 9370183 |
9 | 117822512 |
10 | 1469283166 |
11 | 18210135416 |
12 | 224636864830 |
13 | 2760899996816 |
14 | 33833099832484 |
15 | 413610917006000 |
16 | 5046403030066927 |
17 | 61468359153954656 |
18 | 747672504476150374 |
19 | 9083423595292949240 |
20 | 110239596847544663002 |
21 | 1336700736225591436496 |
22 | 16195256987701502444284 |
[1,20,307,4280,56914,736568,9370183,117822512, 1469283166,18210135416,224636864830,2760899996816, 33833099832484,413610917006000,5046403030066927, 61468359153954656,747672504476150374, 9083423595292949240,110239596847544663002, 1336700736225591436496,16195256987701502444284] |