n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 2 |
4 | 8 |
5 | 22 |
6 | 60 |
7 | 146 |
8 | 352 |
9 | 814 |
10 | 1860 |
11 | 4170 |
12 | 9256 |
13 | 20326 |
14 | 44300 |
15 | 95874 |
16 | 206320 |
17 | 441758 |
18 | 941780 |
19 | 2000058 |
20 | 4233144 |
21 | 8932310 |
22 | 18796700 |
23 | 39457522 |
24 | 82643328 |
25 | 172743182 |
26 | 360399460 |
27 | 750625066 |
28 | 1560902472 |
29 | 3241109574 |
30 | 6720828460 |
31 | 13918875490 |
32 | 28792188176 |
[0,0,0,2,8,22,60,146,352,814,1860,4170,9256,20326, 44300,95874,206320,441758,941780,2000058,4233144, 8932310,18796700,39457522,82643328,172743182, 360399460,750625066,1560902472,3241109574, 6720828460,13918875490,28792188176] |