n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 18 |
5 | 58 |
6 | 221 |
7 | 935 |
8 | 4361 |
9 | 22082 |
10 | 120336 |
11 | 700652 |
12 | 4333933 |
13 | 28345089 |
14 | 195233255 |
15 | 1411303634 |
16 | 10675375402 |
17 | 84276173438 |
18 | 692752181561 |
19 | 5917018378495 |
20 | 52416910416933 |
21 | 480786834535246 |
22 | 4559132648864256 |
23 | 44632792689619592 |
24 | 450518001943669545 |
[1,1,3,6,18,58,221,935,4361,22082,120336,700652, 4333933,28345089,195233255,1411303634,10675375402, 84276173438,692752181561,5917018378495, 52416910416933,480786834535246,4559132648864256, 44632792689619592,450518001943669545] |