n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 14 |
3 | 98 |
4 | 726 |
5 | 5522 |
6 | 42770 |
7 | 335512 |
8 | 2656998 |
9 | 21195944 |
10 | 170076214 |
11 | 1371181110 |
12 | 11098310730 |
13 | 90128497032 |
14 | 734008622872 |
15 | 5992486341248 |
16 | 49028047353670 |
17 | 401885885751630 |
18 | 3299812135410080 |
19 | 27134786911366212 |
20 | 223433635272820126 |
21 | 1842041118321640390 |
[1,2,14,98,726,5522,42770,335512,2656998,21195944, 170076214,1371181110,11098310730,90128497032, 734008622872,5992486341248,49028047353670, 401885885751630,3299812135410080, 27134786911366212,223433635272820126, 1842041118321640390] |