n | a(n) |
---|---|
1 | 3 |
2 | 12 |
3 | 120 |
4 | 1368 |
5 | 18300 |
6 | 268728 |
7 | 4179852 |
8 | 67767744 |
9 | 1133826324 |
10 | 19443072084 |
11 | 340085761968 |
12 | 6046276240668 |
13 | 108970501777080 |
14 | 1986820814551056 |
15 | 36587507853481908 |
16 | 679619087721892176 |
17 | 12720247240214281860 |
18 | 239685390231729125004 |
19 | 4543441582487318876664 |
[3,12,120,1368,18300,268728,4179852,67767744, 1133826324,19443072084,340085761968,6046276240668, 108970501777080,1986820814551056, 36587507853481908,679619087721892176, 12720247240214281860,239685390231729125004, 4543441582487318876664] |