n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 22 |
6 | 90 |
7 | 394 |
8 | 1805 |
9 | 8538 |
10 | 41344 |
11 | 203790 |
12 | 1018562 |
13 | 5148110 |
14 | 26261120 |
15 | 135005708 |
16 | 698686953 |
17 | 3636870218 |
18 | 19027686362 |
19 | 100002510548 |
20 | 527713256528 |
21 | 2794955279330 |
22 | 14852320704712 |
23 | 79164310947304 |
24 | 423126034866776 |
[1,1,2,6,22,90,394,1805,8538,41344,203790,1018562, 5148110,26261120,135005708,698686953,3636870218, 19027686362,100002510548,527713256528, 2794955279330,14852320704712,79164310947304, 423126034866776] |