n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 2 |
4 | 4 |
5 | 16 |
6 | 38 |
7 | 104 |
8 | 456 |
9 | 1600 |
10 | 6154 |
11 | 29952 |
12 | 131660 |
13 | 644736 |
14 | 3516334 |
15 | 18383616 |
16 | 106736272 |
17 | 645554176 |
18 | 3902982930 |
19 | 25645936640 |
20 | 170222268308 |
21 | 1160636121088 |
22 | 8352824699446 |
23 | 60217271582720 |
24 | 450765801976408 |
[0,1,2,2,4,16,38,104,456,1600,6154,29952,131660, 644736,3516334,18383616,106736272,645554176, 3902982930,25645936640,170222268308,1160636121088, 8352824699446,60217271582720,450765801976408] |