n | a(n) |
---|---|
2 | 1 |
3 | 3 |
4 | 9 |
5 | 26 |
6 | 75 |
7 | 218 |
8 | 640 |
9 | 1898 |
10 | 5682 |
11 | 17155 |
12 | 52187 |
13 | 159827 |
14 | 492417 |
15 | 1525222 |
16 | 4746906 |
17 | 14837444 |
18 | 46558573 |
19 | 146614539 |
20 | 463186317 |
21 | 1467631144 |
22 | 4662899110 |
23 | 14851847390 |
24 | 47414162252 |
25 | 151692982789 |
26 | 486280700344 |
27 | 1561757802585 |
28 | 5024492606869 |
29 | 16191028967145 |
30 | 52253656263073 |
31 | 168880350860512 |
[1,3,9,26,75,218,640,1898,5682,17155,52187,159827, 492417,1525222,4746906,14837444,46558573, 146614539,463186317,1467631144,4662899110, 14851847390,47414162252,151692982789,486280700344, 1561757802585,5024492606869,16191028967145, 52253656263073,168880350860512] |