n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 47 |
5 | 181 |
6 | 729 |
7 | 2948 |
8 | 12031 |
9 | 49540 |
10 | 205153 |
11 | 853546 |
12 | 3565505 |
13 | 14943839 |
14 | 62810786 |
15 | 264650683 |
16 | 1117486463 |
17 | 4727486583 |
18 | 20032950744 |
19 | 85017558081 |
20 | 361289789377 |
21 | 1537198394570 |
22 | 6547611493822 |
23 | 27917246924099 |
24 | 119141276756545 |
25 | 508884954441331 |
26 | 2175284934712217 |
27 | 9305217981192748 |
[1,1,3,13,47,181,729,2948,12031,49540,205153, 853546,3565505,14943839,62810786,264650683, 1117486463,4727486583,20032950744,85017558081, 361289789377,1537198394570,6547611493822, 27917246924099,119141276756545,508884954441331, 2175284934712217,9305217981192748] |