n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 35 |
4 | 180 |
5 | 921 |
6 | 4626 |
7 | 23215 |
8 | 116160 |
9 | 581141 |
10 | 2906046 |
11 | 14531595 |
12 | 72659340 |
13 | 363302161 |
14 | 1816516266 |
15 | 9082603175 |
16 | 45413037720 |
17 | 227065275981 |
18 | 1135326467286 |
19 | 5676632685955 |
20 | 28383163779300 |
21 | 141915820294601 |
22 | 709579102871106 |
23 | 3547895519947935 |
24 | 17739477605332080 |
25 | 88697388049030021 |
[1,6,35,180,921,4626,23215,116160,581141,2906046, 14531595,72659340,363302161,1816516266,9082603175, 45413037720,227065275981,1135326467286, 5676632685955,28383163779300,141915820294601, 709579102871106,3547895519947935, 17739477605332080,88697388049030021] |