n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 41 |
4 | 164 |
5 | 590 |
6 | 2360 |
7 | 8715 |
8 | 34860 |
9 | 130776 |
10 | 523104 |
11 | 1983212 |
12 | 7932848 |
13 | 30303416 |
14 | 121213664 |
15 | 465673065 |
16 | 1862692260 |
17 | 7187760140 |
18 | 28751040560 |
19 | 111338982436 |
20 | 445355929744 |
21 | 1729672999418 |
22 | 6918691997672 |
23 | 26936111629934 |
24 | 107744446519736 |
25 | 420338301077100 |
[1,3,12,41,164,590,2360,8715,34860,130776,523104, 1983212,7932848,30303416,121213664,465673065, 1862692260,7187760140,28751040560,111338982436, 445355929744,1729672999418,6918691997672, 26936111629934,107744446519736,420338301077100] |