n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 21 |
5 | 39 |
6 | 141 |
7 | 258 |
8 | 939 |
9 | 1713 |
10 | 6243 |
11 | 11382 |
12 | 41493 |
13 | 75639 |
14 | 275757 |
15 | 502674 |
16 | 1832619 |
17 | 3340641 |
18 | 12179139 |
19 | 22201062 |
20 | 80939541 |
21 | 147542727 |
22 | 537904077 |
23 | 980532258 |
24 | 3574776747 |
25 | 6516373521 |
26 | 23757077283 |
27 | 43306197846 |
28 | 157883627541 |
29 | 287802221079 |
[0,1,3,6,21,39,141,258,939,1713,6243,11382,41493, 75639,275757,502674,1832619,3340641,12179139, 22201062,80939541,147542727,537904077,980532258, 3574776747,6516373521,23757077283,43306197846, 157883627541,287802221079] |