n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 15 |
5 | 33 |
6 | 78 |
7 | 177 |
8 | 411 |
9 | 942 |
10 | 2175 |
11 | 5001 |
12 | 11526 |
13 | 26529 |
14 | 61107 |
15 | 140694 |
16 | 324015 |
17 | 746097 |
18 | 1718142 |
19 | 3956433 |
20 | 9110859 |
21 | 20980158 |
22 | 48312735 |
23 | 111253209 |
24 | 256191414 |
25 | 589951041 |
26 | 1358525283 |
27 | 3128378406 |
28 | 7203954255 |
29 | 16589089473 |
30 | 38200952238 |
31 | 87968220657 |
[1,1,3,6,15,33,78,177,411,942,2175,5001,11526, 26529,61107,140694,324015,746097,1718142,3956433, 9110859,20980158,48312735,111253209,256191414, 589951041,1358525283,3128378406,7203954255, 16589089473,38200952238,87968220657] |