n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 5 |
3 | 6 |
4 | 35 |
5 | 80 |
6 | 306 |
7 | 880 |
8 | 3003 |
9 | 9384 |
10 | 31070 |
11 | 100226 |
12 | 330015 |
13 | 1079392 |
14 | 3559001 |
15 | 11724930 |
16 | 38772445 |
17 | 128313480 |
18 | 425553513 |
19 | 1412911148 |
20 | 4697992880 |
21 | 15637660896 |
22 | 52109660575 |
23 | 173809285676 |
24 | 580261793715 |
25 | 1938778221800 |
26 | 6482844907190 |
27 | 21692435752290 |
28 | 72633495206803 |
[1,0,5,6,35,80,306,880,3003,9384,31070,100226, 330015,1079392,3559001,11724930,38772445, 128313480,425553513,1412911148,4697992880, 15637660896,52109660575,173809285676,580261793715, 1938778221800,6482844907190,21692435752290, 72633495206803] |