n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 6 |
4 | 27 |
5 | 110 |
6 | 430 |
7 | 1652 |
8 | 6307 |
9 | 24054 |
10 | 91866 |
11 | 351692 |
12 | 1350030 |
13 | 5196204 |
14 | 20050108 |
15 | 77542376 |
16 | 300507427 |
17 | 1166737574 |
18 | 4537436578 |
19 | 17672369756 |
20 | 68922740122 |
21 | 269127888644 |
22 | 1052047384708 |
23 | 4116711169496 |
24 | 16123793452942 |
25 | 63205286441660 |
26 | 247959232919620 |
27 | 973469645715192 |
[0,1,6,27,110,430,1652,6307,24054,91866,351692, 1350030,5196204,20050108,77542376,300507427, 1166737574,4537436578,17672369756,68922740122, 269127888644,1052047384708,4116711169496, 16123793452942,63205286441660,247959232919620, 973469645715192] |