n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 0 |
5 | 5 |
6 | 4 |
7 | 23 |
8 | 36 |
9 | 123 |
10 | 252 |
11 | 720 |
12 | 1664 |
13 | 4427 |
14 | 10804 |
15 | 27971 |
16 | 69972 |
17 | 179469 |
18 | 454300 |
19 | 1162529 |
20 | 2961056 |
21 | 7579620 |
22 | 19376728 |
23 | 49659406 |
24 | 127263208 |
25 | 326610827 |
26 | 838550920 |
27 | 2154985059 |
28 | 5540935616 |
29 | 14257159799 |
30 | 36703613556 |
31 | 94544579575 |
[0,0,0,1,0,5,4,23,36,123,252,720,1664,4427,10804, 27971,69972,179469,454300,1162529,2961056,7579620, 19376728,49659406,127263208,326610827,838550920, 2154985059,5540935616,14257159799,36703613556, 94544579575] |