n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 4 |
5 | 12 |
6 | 31 |
7 | 74 |
8 | 168 |
9 | 369 |
10 | 792 |
11 | 1672 |
12 | 3487 |
13 | 7206 |
14 | 14788 |
15 | 30185 |
16 | 61356 |
17 | 124308 |
18 | 251199 |
19 | 506578 |
20 | 1019920 |
21 | 2050785 |
22 | 4119280 |
23 | 8267216 |
24 | 16580799 |
25 | 33236622 |
26 | 66594636 |
27 | 133385689 |
28 | 267089188 |
29 | 534692604 |
30 | 1070217247 |
31 | 2141780762 |
32 | 4285739832 |
33 | 8575004241 |
[0,0,0,1,4,12,31,74,168,369,792,1672,3487,7206, 14788,30185,61356,124308,251199,506578,1019920, 2050785,4119280,8267216,16580799,33236622, 66594636,133385689,267089188,534692604,1070217247, 2141780762,4285739832,8575004241] |