n | a(n) |
---|---|
2 | 1 |
3 | 2 |
4 | 7 |
5 | 34 |
6 | 219 |
7 | 1787 |
8 | 17936 |
9 | 216169 |
10 | 3069552 |
11 | 50562672 |
12 | 953877927 |
13 | 20389082457 |
14 | 489301660818 |
15 | 13080166471127 |
16 | 386841424466953 |
17 | 12581201258360820 |
18 | 447574544428423114 |
19 | 17333939484785264282 |
20 | 727718718839603466267 |
[1,2,7,34,219,1787,17936,216169,3069552,50562672, 953877927,20389082457,489301660818,13080166471127, 386841424466953,12581201258360820, 447574544428423114,17333939484785264282, 727718718839603466267] |