n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 30 |
4 | 145 |
5 | 733 |
6 | 3540 |
7 | 17300 |
8 | 84479 |
9 | 411963 |
10 | 2011408 |
11 | 9816506 |
12 | 47911847 |
13 | 233851991 |
14 | 1141365064 |
15 | 5570761346 |
16 | 27189615925 |
17 | 132706261547 |
18 | 647709321582 |
19 | 3161321546320 |
20 | 15429691961077 |
21 | 75308819284819 |
22 | 367565220881250 |
23 | 1794002281279416 |
24 | 8756117243124305 |
[1,1,6,30,145,733,3540,17300,84479,411963,2011408, 9816506,47911847,233851991,1141365064,5570761346, 27189615925,132706261547,647709321582, 3161321546320,15429691961077,75308819284819, 367565220881250,1794002281279416,8756117243124305] |