n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 3 |
6 | 2 |
7 | 11 |
8 | 9 |
9 | 55 |
10 | 70 |
11 | 345 |
12 | 494 |
13 | 2412 |
14 | 3788 |
15 | 18127 |
16 | 30799 |
17 | 143255 |
18 | 256353 |
19 | 1173770 |
20 | 2190163 |
21 | 9892302 |
22 | 19130814 |
23 | 85289390 |
24 | 169923748 |
25 | 749329719 |
26 | 1531701274 |
27 | 6688893605 |
28 | 13984116304 |
29 | 60526543480 |
30 | 129073842978 |
[1,0,1,1,3,2,11,9,55,70,345,494,2412,3788,18127, 30799,143255,256353,1173770,2190163,9892302, 19130814,85289390,169923748,749329719,1531701274, 6688893605,13984116304,60526543480,129073842978] |