n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 15 |
4 | 45 |
5 | 120 |
6 | 326 |
7 | 835 |
8 | 2145 |
9 | 5345 |
10 | 13220 |
11 | 32068 |
12 | 76965 |
13 | 181975 |
14 | 425490 |
15 | 982615 |
16 | 2245444 |
17 | 5077090 |
18 | 11371250 |
19 | 25235790 |
20 | 55536870 |
21 | 121250185 |
22 | 262769080 |
23 | 565502405 |
24 | 1209096875 |
25 | 2569270050 |
26 | 5427963902 |
27 | 11404408525 |
28 | 23836421895 |
29 | 49573316740 |
30 | 102610460240 |
[1,5,15,45,120,326,835,2145,5345,13220,32068, 76965,181975,425490,982615,2245444,5077090, 11371250,25235790,55536870,121250185,262769080, 565502405,1209096875,2569270050,5427963902, 11404408525,23836421895,49573316740,102610460240] |