n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 4 |
6 | 4 |
7 | 21 |
8 | 32 |
9 | 111 |
10 | 200 |
11 | 462 |
12 | 1162 |
13 | 1875 |
14 | 4195 |
15 | 9410 |
16 | 17978 |
17 | 24034 |
18 | 73175 |
19 | 79925 |
20 | 251808 |
21 | 358096 |
22 | 631919 |
23 | 796571 |
24 | 3104082 |
25 | 2980476 |
26 | 6088310 |
27 | 10167660 |
28 | 23661369 |
29 | 21477012 |
30 | 84485584 |
[1,0,1,1,4,4,21,32,111,200,462,1162,1875,4195, 9410,17978,24034,73175,79925,251808,358096,631919, 796571,3104082,2980476,6088310,10167660,23661369, 21477012,84485584] |