n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 10 |
4 | 25 |
5 | 64 |
6 | 166 |
7 | 437 |
8 | 1157 |
9 | 3087 |
10 | 8276 |
11 | 22287 |
12 | 60230 |
13 | 163284 |
14 | 443820 |
15 | 1209155 |
16 | 3300890 |
17 | 9027337 |
18 | 24727437 |
19 | 67829684 |
20 | 186302693 |
21 | 512301120 |
22 | 1410237805 |
23 | 3885803531 |
24 | 10716571591 |
25 | 29579231200 |
26 | 81704634803 |
27 | 225845362116 |
[1,2,4,10,25,64,166,437,1157,3087,8276,22287, 60230,163284,443820,1209155,3300890,9027337, 24727437,67829684,186302693,512301120,1410237805, 3885803531,10716571591,29579231200,81704634803, 225845362116] |