n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 12 |
3 | 60 |
4 | 240 |
5 | 1020 |
6 | 4020 |
7 | 16380 |
8 | 65280 |
9 | 262080 |
10 | 1047540 |
11 | 4194300 |
12 | 16772880 |
13 | 67108860 |
14 | 268419060 |
15 | 1073740740 |
16 | 4294901760 |
17 | 17179869180 |
18 | 68719210560 |
19 | 274877906940 |
20 | 1099510578960 |
21 | 4398046494660 |
22 | 17592181850100 |
23 | 70368744177660 |
24 | 281474959868160 |
[1,4,12,60,240,1020,4020,16380,65280,262080, 1047540,4194300,16772880,67108860,268419060, 1073740740,4294901760,17179869180,68719210560, 274877906940,1099510578960,4398046494660, 17592181850100,70368744177660,281474959868160] |