n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 24 |
3 | 176 |
4 | 1440 |
5 | 12608 |
6 | 115584 |
7 | 1095424 |
8 | 10646016 |
9 | 105522176 |
10 | 1062623232 |
11 | 10840977408 |
12 | 111811534848 |
13 | 1163909087232 |
14 | 12212421230592 |
15 | 129027376349184 |
16 | 1371482141884416 |
17 | 14656212306231296 |
18 | 157369985643577344 |
19 | 1696975718802522112 |
20 | 18369603773021552640 |
[1,4,24,176,1440,12608,115584,1095424,10646016, 105522176,1062623232,10840977408,111811534848, 1163909087232,12212421230592,129027376349184, 1371482141884416,14656212306231296, 157369985643577344,1696975718802522112, 18369603773021552640] |