n | a(n) |
---|---|
1 | 1 |
2 | 20 |
3 | 616 |
4 | 28160 |
5 | 1805056 |
6 | 154918400 |
7 | 17171485696 |
8 | 2389096202240 |
9 | 407776690241536 |
10 | 83793407533383680 |
11 | 20407552701432856576 |
12 | 5813146553630295326720 |
13 | 1914890082050142493474816 |
[1,20,616,28160,1805056,154918400,17171485696, 2389096202240,407776690241536,83793407533383680, 20407552701432856576,5813146553630295326720, 1914890082050142493474816] |