n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 12 |
4 | 54 |
5 | 100 |
6 | 330 |
7 | 1050 |
8 | 3024 |
9 | 8736 |
10 | 23220 |
11 | 62700 |
12 | 158004 |
13 | 406692 |
14 | 986986 |
15 | 2452450 |
16 | 5788640 |
17 | 14002560 |
18 | 32357052 |
19 | 76640148 |
20 | 174174520 |
21 | 405623400 |
22 | 909582212 |
23 | 2089064516 |
24 | 4633556448 |
25 | 10519464000 |
26 | 23120533800 |
27 | 51977741400 |
28 | 113365499940 |
29 | 252725219460 |
30 | 547593359850 |
31 | 1211884139250 |
32 | 2610998927040 |
33 | 5741708459520 |
34 | 12309472580460 |
35 | 26917328938500 |
[1,1,2,12,54,100,330,1050,3024,8736,23220,62700, 158004,406692,986986,2452450,5788640,14002560, 32357052,76640148,174174520,405623400,909582212, 2089064516,4633556448,10519464000,23120533800, 51977741400,113365499940,252725219460, 547593359850,1211884139250,2610998927040, 5741708459520,12309472580460,26917328938500] |