n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 77 |
6 | 286 |
7 | 1066 |
8 | 3977 |
9 | 14841 |
10 | 55386 |
11 | 206702 |
12 | 771421 |
13 | 2878981 |
14 | 10744502 |
15 | 40099026 |
16 | 149651601 |
17 | 558507377 |
18 | 2084377906 |
19 | 7779004246 |
20 | 29031639077 |
21 | 108347552061 |
22 | 404358569166 |
23 | 1509086724602 |
24 | 5631988329241 |
25 | 21018866592361 |
26 | 78443478040202 |
27 | 292755045568446 |
[1,2,6,21,77,286,1066,3977,14841,55386,206702, 771421,2878981,10744502,40099026,149651601, 558507377,2084377906,7779004246,29031639077, 108347552061,404358569166,1509086724602, 5631988329241,21018866592361,78443478040202, 292755045568446] |