n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 4 |
4 | 8 |
5 | 24 |
6 | 56 |
7 | 144 |
8 | 376 |
9 | 960 |
10 | 2512 |
11 | 6560 |
12 | 17184 |
13 | 45248 |
14 | 119296 |
15 | 315392 |
16 | 835552 |
17 | 2217216 |
18 | 5893568 |
19 | 15687552 |
20 | 41810944 |
21 | 111567104 |
22 | 298016512 |
23 | 796832256 |
24 | 2132456704 |
25 | 5711486976 |
26 | 15309014528 |
27 | 41062927360 |
28 | 110213725184 |
29 | 295995574272 |
30 | 795391639552 |
[1,0,2,4,8,24,56,144,376,960,2512,6560,17184, 45248,119296,315392,835552,2217216,5893568, 15687552,41810944,111567104,298016512,796832256, 2132456704,5711486976,15309014528,41062927360, 110213725184,295995574272,795391639552] |