n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 7 |
4 | 16 |
5 | 40 |
6 | 119 |
7 | 450 |
8 | 2253 |
9 | 15207 |
10 | 139190 |
11 | 1731703 |
12 | 29335875 |
13 | 677864041 |
14 | 21400069232 |
15 | 924419728471 |
16 | 54716596051100 |
17 | 4443400439075834 |
18 | 495676372493566749 |
19 | 76041424515817042402 |
20 | 16060385520094706930608 |
21 | 4674665948889147697184915 |
[1,3,7,16,40,119,450,2253,15207,139190,1731703, 29335875,677864041,21400069232,924419728471, 54716596051100,4443400439075834, 495676372493566749,76041424515817042402, 16060385520094706930608,4674665948889147697184915] |