n | a(n) |
---|---|
2 | 1 |
3 | 8 |
4 | 47 |
5 | 224 |
6 | 1130 |
7 | 4868 |
8 | 23404 |
9 | 97230 |
10 | 457264 |
11 | 1868456 |
12 | 8679894 |
13 | 35162196 |
14 | 162087345 |
15 | 653396608 |
16 | 2996092939 |
17 | 12041970574 |
18 | 55006554003 |
19 | 220673343660 |
20 | 1005105011265 |
21 | 4027407386110 |
22 | 18302390130349 |
23 | 73278803406040 |
24 | 332412585527847 |
25 | 1330205838019114 |
26 | 6025308727310905 |
[1,8,47,224,1130,4868,23404,97230,457264,1868456, 8679894,35162196,162087345,653396608,2996092939, 12041970574,55006554003,220673343660, 1005105011265,4027407386110,18302390130349, 73278803406040,332412585527847,1330205838019114, 6025308727310905] |