n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 11 |
5 | 41 |
6 | 161 |
7 | 694 |
8 | 3151 |
9 | 14851 |
10 | 71621 |
11 | 350384 |
12 | 1729091 |
13 | 8577661 |
14 | 42686281 |
15 | 212828074 |
16 | 1062335831 |
17 | 5306276471 |
18 | 26515196141 |
19 | 132527465764 |
20 | 662491871371 |
21 | 3312023159281 |
22 | 16558807553201 |
23 | 82790113735454 |
24 | 413938797983711 |
[1,1,4,11,41,161,694,3151,14851,71621,350384, 1729091,8577661,42686281,212828074,1062335831, 5306276471,26515196141,132527465764,662491871371, 3312023159281,16558807553201,82790113735454, 413938797983711] |