n | a(n) |
---|---|
5 | 1 |
6 | 3 |
7 | 24 |
8 | 150 |
9 | 825 |
10 | 4205 |
11 | 20384 |
12 | 95472 |
13 | 436050 |
14 | 1954150 |
15 | 8629528 |
16 | 37665030 |
17 | 162845865 |
18 | 698599125 |
19 | 2977488000 |
20 | 12620579140 |
21 | 53243068230 |
22 | 223707978090 |
23 | 936619554000 |
24 | 3909283969500 |
25 | 16272003594658 |
26 | 67565854800378 |
27 | 279942274434624 |
[1,3,24,150,825,4205,20384,95472,436050,1954150, 8629528,37665030,162845865,698599125,2977488000, 12620579140,53243068230,223707978090,936619554000, 3909283969500,16272003594658,67565854800378, 279942274434624] |