n | a(n) |
---|---|
0 | 1 |
1 | 28 |
2 | 336 |
3 | 2520 |
4 | 13860 |
5 | 60984 |
6 | 226512 |
7 | 736164 |
8 | 2147145 |
9 | 5725720 |
10 | 14158144 |
11 | 32821152 |
12 | 71954064 |
13 | 150233760 |
14 | 300467520 |
15 | 578399976 |
16 | 1075994073 |
17 | 1941008916 |
18 | 3405278800 |
19 | 5824819000 |
20 | 9735768900 |
21 | 15931258200 |
22 | 25565576400 |
23 | 40293571500 |
24 | 62455035825 |
25 | 95315993136 |
[1,28,336,2520,13860,60984,226512,736164,2147145, 5725720,14158144,32821152,71954064,150233760, 300467520,578399976,1075994073,1941008916, 3405278800,5824819000,9735768900,15931258200, 25565576400,40293571500,62455035825,95315993136] |