n | a(n) |
---|---|
0 | 2 |
1 | 9 |
2 | 32 |
3 | 115 |
4 | 420 |
5 | 1554 |
6 | 5808 |
7 | 21879 |
8 | 82940 |
9 | 316030 |
10 | 1209312 |
11 | 4644094 |
12 | 17889032 |
13 | 69089700 |
14 | 267444000 |
15 | 1037348415 |
16 | 4030774380 |
17 | 15687019590 |
18 | 61137753600 |
19 | 238580530650 |
20 | 932105099640 |
21 | 3645473785980 |
22 | 14271279927840 |
23 | 55918717024950 |
24 | 219283705045080 |
25 | 860564513057004 |
26 | 3379592965275968 |
[2,9,32,115,420,1554,5808,21879,82940,316030, 1209312,4644094,17889032,69089700,267444000, 1037348415,4030774380,15687019590,61137753600, 238580530650,932105099640,3645473785980, 14271279927840,55918717024950,219283705045080, 860564513057004,3379592965275968] |