n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 4 |
4 | 12 |
5 | 16 |
6 | 76 |
7 | 128 |
8 | 386 |
9 | 832 |
10 | 2368 |
11 | 5024 |
12 | 13946 |
13 | 31680 |
14 | 82632 |
15 | 193696 |
16 | 498174 |
17 | 1182464 |
18 | 2993384 |
19 | 7213648 |
20 | 18061074 |
21 | 43832960 |
22 | 109163384 |
23 | 266217472 |
24 | 660116398 |
25 | 1615451648 |
26 | 3995295112 |
27 | 9796774896 |
28 | 24189684402 |
29 | 59396496000 |
30 | 146494223160 |
31 | 360026507808 |
[1,0,2,4,12,16,76,128,386,832,2368,5024,13946, 31680,82632,193696,498174,1182464,2993384,7213648, 18061074,43832960,109163384,266217472,660116398, 1615451648,3995295112,9796774896,24189684402, 59396496000,146494223160,360026507808] |