n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 4 |
6 | 22 |
7 | 98 |
8 | 412 |
9 | 1700 |
10 | 6974 |
11 | 28576 |
12 | 117146 |
13 | 480722 |
14 | 1974914 |
15 | 8122084 |
16 | 33435390 |
17 | 137757480 |
18 | 567998152 |
19 | 2343472004 |
20 | 9674252070 |
21 | 39956606552 |
22 | 165099840920 |
23 | 682446679582 |
24 | 2821858504062 |
25 | 11671572244666 |
26 | 48287711006032 |
27 | 199822535773958 |
28 | 827069530795224 |
29 | 3423890026639184 |
30 | 14176516741276534 |
[0,0,0,0,4,22,98,412,1700,6974,28576,117146, 480722,1974914,8122084,33435390,137757480, 567998152,2343472004,9674252070,39956606552, 165099840920,682446679582,2821858504062, 11671572244666,48287711006032,199822535773958, 827069530795224,3423890026639184, 14176516741276534] |