n | a(n) |
---|---|
1 | 0 |
2 | 26 |
3 | 158 |
4 | 886 |
5 | 4382 |
6 | 20593 |
7 | 93326 |
8 | 410789 |
9 | 1768582 |
10 | 7492763 |
11 | 31338310 |
12 | 129696524 |
13 | 531993558 |
14 | 2165446751 |
15 | 8755471090 |
16 | 35192210828 |
17 | 140712962436 |
18 | 559989349075 |
19 | 2219142915606 |
20 | 8760369870437 |
21 | 34461931251266 |
22 | 135134230809249 |
[0,26,158,886,4382,20593,93326,410789,1768582, 7492763,31338310,129696524,531993558,2165446751, 8755471090,35192210828,140712962436,559989349075, 2219142915606,8760369870437,34461931251266, 135134230809249] |