n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 380 |
3 | 7220 |
4 | 137180 |
5 | 2606420 |
6 | 49521980 |
7 | 940917620 |
8 | 17877434780 |
9 | 339671260630 |
10 | 6453753948360 |
11 | 122621324950440 |
12 | 2329805172758760 |
13 | 44266298257724040 |
14 | 841059666427601160 |
15 | 15980133653210465640 |
[1,20,380,7220,137180,2606420,49521980,940917620, 17877434780,339671260630,6453753948360, 122621324950440,2329805172758760, 44266298257724040,841059666427601160, 15980133653210465640] |