n | a(n) |
---|---|
0 | 2 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 43 |
5 | 118 |
6 | 316 |
7 | 836 |
8 | 2199 |
9 | 5769 |
10 | 15117 |
11 | 39592 |
12 | 103670 |
13 | 271430 |
14 | 710633 |
15 | 1860483 |
16 | 4870831 |
17 | 12752026 |
18 | 33385264 |
19 | 87403784 |
20 | 228826107 |
21 | 599074557 |
22 | 1568397585 |
23 | 4106118220 |
24 | 10749957098 |
25 | 28143753098 |
26 | 73681302221 |
27 | 192900153591 |
[2,2,5,15,43,118,316,836,2199,5769,15117,39592, 103670,271430,710633,1860483,4870831,12752026, 33385264,87403784,228826107,599074557,1568397585, 4106118220,10749957098,28143753098,73681302221, 192900153591] |