n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 9 |
4 | 22 |
5 | 56 |
6 | 145 |
7 | 378 |
8 | 988 |
9 | 2585 |
10 | 6766 |
11 | 17712 |
12 | 46369 |
13 | 121394 |
14 | 317812 |
15 | 832041 |
16 | 2178310 |
17 | 5702888 |
18 | 14930353 |
19 | 39088170 |
20 | 102334156 |
21 | 267914297 |
22 | 701408734 |
23 | 1836311904 |
24 | 4807526977 |
25 | 12586269026 |
26 | 32951280100 |
27 | 86267571273 |
[1,2,4,9,22,56,145,378,988,2585,6766,17712,46369, 121394,317812,832041,2178310,5702888,14930353, 39088170,102334156,267914297,701408734,1836311904, 4807526977,12586269026,32951280100,86267571273] |