n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 32 |
5 | 118 |
6 | 460 |
7 | 1844 |
8 | 7587 |
9 | 31804 |
10 | 135433 |
11 | 584092 |
12 | 2546250 |
13 | 11201310 |
14 | 49663816 |
15 | 221701658 |
16 | 995621590 |
17 | 4494862920 |
18 | 20388491423 |
19 | 92872814115 |
20 | 424665159560 |
21 | 1948516758192 |
22 | 8968647197842 |
23 | 41399782218408 |
24 | 191608577837136 |
[1,1,3,9,32,118,460,1844,7587,31804,135433,584092, 2546250,11201310,49663816,221701658,995621590, 4494862920,20388491423,92872814115,424665159560, 1948516758192,8968647197842,41399782218408, 191608577837136] |