n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 4 |
3 | 8 |
4 | 32 |
5 | 120 |
6 | 464 |
7 | 1848 |
8 | 7312 |
9 | 29240 |
10 | 116624 |
11 | 466488 |
12 | 1864592 |
13 | 7458360 |
14 | 29827984 |
15 | 119311928 |
16 | 477225872 |
17 | 1908903480 |
18 | 7635526544 |
19 | 30542106168 |
20 | 122168075152 |
21 | 488672300600 |
22 | 1954687804304 |
23 | 7818751217208 |
24 | 31274999276432 |
25 | 125099997105720 |
26 | 500399966053264 |
27 | 2001599864213048 |
[0,0,4,8,32,120,464,1848,7312,29240,116624,466488, 1864592,7458360,29827984,119311928,477225872, 1908903480,7635526544,30542106168,122168075152, 488672300600,1954687804304,7818751217208, 31274999276432,125099997105720,500399966053264, 2001599864213048] |