n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 44 |
5 | 144 |
6 | 432 |
7 | 1216 |
8 | 3264 |
9 | 8448 |
10 | 21248 |
11 | 52224 |
12 | 125952 |
13 | 299008 |
14 | 700416 |
15 | 1622016 |
16 | 3719168 |
17 | 8454144 |
18 | 19070976 |
19 | 42729472 |
20 | 95158272 |
21 | 210763776 |
22 | 464519168 |
23 | 1019215872 |
24 | 2227175424 |
25 | 4848615424 |
26 | 10519314432 |
27 | 22749904896 |
28 | 49056579584 |
29 | 105495134208 |
30 | 226291089408 |
[1,3,12,44,144,432,1216,3264,8448,21248,52224, 125952,299008,700416,1622016,3719168,8454144, 19070976,42729472,95158272,210763776,464519168, 1019215872,2227175424,4848615424,10519314432, 22749904896,49056579584,105495134208,226291089408] |