n | a(n) |
---|---|
4 | 1 |
5 | 3 |
6 | 12 |
7 | 40 |
8 | 133 |
9 | 427 |
10 | 1352 |
11 | 4224 |
12 | 13080 |
13 | 40216 |
14 | 122980 |
15 | 374452 |
16 | 1136226 |
17 | 3438150 |
18 | 10380048 |
19 | 31279728 |
20 | 94114125 |
21 | 282804759 |
22 | 848886180 |
23 | 2545759328 |
24 | 7628718845 |
25 | 22845628531 |
26 | 68377674280 |
27 | 204560102800 |
28 | 611720539235 |
29 | 1828673918721 |
[1,3,12,40,133,427,1352,4224,13080,40216,122980, 374452,1136226,3438150,10380048,31279728,94114125, 282804759,848886180,2545759328,7628718845, 22845628531,68377674280,204560102800,611720539235, 1828673918721] |