n | a(n) |
---|---|
1 | 0 |
2 | 5 |
3 | 10 |
4 | 40 |
5 | 120 |
6 | 400 |
7 | 1280 |
8 | 4160 |
9 | 13440 |
10 | 43520 |
11 | 140800 |
12 | 455680 |
13 | 1474560 |
14 | 4771840 |
15 | 15441920 |
16 | 49971200 |
17 | 161710080 |
18 | 523304960 |
19 | 1693450240 |
20 | 5480120320 |
21 | 17734041600 |
22 | 57388564480 |
23 | 185713295360 |
24 | 600980848640 |
25 | 1944814878720 |
[0,5,10,40,120,400,1280,4160,13440,43520,140800, 455680,1474560,4771840,15441920,49971200, 161710080,523304960,1693450240,5480120320, 17734041600,57388564480,185713295360,600980848640, 1944814878720] |