n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 31 |
6 | 111 |
7 | 415 |
8 | 1589 |
9 | 6209 |
10 | 24617 |
11 | 98755 |
12 | 399853 |
13 | 1631223 |
14 | 6695623 |
15 | 27622559 |
16 | 114432337 |
17 | 475698713 |
18 | 1983128001 |
19 | 8286708835 |
20 | 34692334537 |
21 | 145457648071 |
22 | 610578202095 |
23 | 2565147448607 |
24 | 10782647145589 |
25 | 45338223018217 |
[1,1,3,9,31,111,415,1589,6209,24617,98755,399853, 1631223,6695623,27622559,114432337,475698713, 1983128001,8286708835,34692334537,145457648071, 610578202095,2565147448607,10782647145589, 45338223018217] |