n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 4 |
4 | 7 |
5 | 12 |
6 | 25 |
7 | 56 |
8 | 145 |
9 | 422 |
10 | 1389 |
11 | 5072 |
12 | 20283 |
13 | 87996 |
14 | 412663 |
15 | 2087868 |
16 | 11361831 |
17 | 66155642 |
18 | 409567833 |
19 | 2680486870 |
20 | 18465061963 |
21 | 133504614880 |
22 | 1011121118741 |
23 | 8008145020804 |
24 | 66201411633209 |
25 | 570006877641976 |
[1,2,3,4,7,12,25,56,145,422,1389,5072,20283,87996, 412663,2087868,11361831,66155642,409567833, 2680486870,18465061963,133504614880,1011121118741, 8008145020804,66201411633209,570006877641976] |