n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 3 |
4 | 6 |
5 | 30 |
6 | 35 |
7 | 210 |
8 | 350 |
9 | 1344 |
10 | 3402 |
11 | 9240 |
12 | 29139 |
13 | 72072 |
14 | 231660 |
15 | 603603 |
16 | 1814670 |
17 | 5095376 |
18 | 14507324 |
19 | 42401502 |
20 | 118974466 |
21 | 349305120 |
22 | 990073812 |
23 | 2877816304 |
24 | 8272748675 |
25 | 23852438880 |
26 | 69116072950 |
27 | 198980348385 |
28 | 577566713520 |
29 | 1667118322590 |
30 | 4834810467135 |
[1,0,2,3,6,30,35,210,350,1344,3402,9240,29139, 72072,231660,603603,1814670,5095376,14507324, 42401502,118974466,349305120,990073812,2877816304, 8272748675,23852438880,69116072950,198980348385, 577566713520,1667118322590,4834810467135] |