n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 23 |
5 | 72 |
6 | 280 |
7 | 1242 |
8 | 6331 |
9 | 36236 |
10 | 230726 |
11 | 1615584 |
12 | 12342422 |
13 | 102145644 |
14 | 910393530 |
15 | 8693609421 |
16 | 88552405435 |
17 | 958361506524 |
18 | 10982014291650 |
19 | 132835979792636 |
20 | 1691320230842116 |
21 | 22611285878526978 |
22 | 316685416851528722 |
23 | 4636988553066906265 |
[0,1,3,8,23,72,280,1242,6331,36236,230726,1615584, 12342422,102145644,910393530,8693609421, 88552405435,958361506524,10982014291650, 132835979792636,1691320230842116, 22611285878526978,316685416851528722, 4636988553066906265] |