n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 86 |
3 | 3480 |
4 | 208054 |
5 | 16486680 |
6 | 1628301884 |
7 | 192666441968 |
8 | 26569595376038 |
9 | 4184718381424152 |
10 | 741138328282003860 |
11 | 145795774074768177360 |
12 | 31540994233548116475196 |
13 | 7442380580681963411363440 |
14 | 1902155375416975061879918520 |
15 | 523496081998297020687019596000 |
[1,4,86,3480,208054,16486680,1628301884, 192666441968,26569595376038,4184718381424152, 741138328282003860,145795774074768177360, 31540994233548116475196,7442380580681963411363440, 1902155375416975061879918520, 523496081998297020687019596000] |