n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 40 |
5 | 147 |
6 | 537 |
7 | 2067 |
8 | 8090 |
9 | 31759 |
10 | 127226 |
11 | 512728 |
12 | 2085944 |
13 | 8530109 |
14 | 35108141 |
15 | 145290427 |
16 | 603473533 |
17 | 2516899058 |
18 | 10535376447 |
19 | 44235546052 |
20 | 186238821286 |
21 | 786137476704 |
22 | 3326533736676 |
23 | 14104293872530 |
24 | 59921599051958 |
25 | 255045546995888 |
26 | 1087354970834820 |
27 | 4643011158411006 |
[1,1,4,11,40,147,537,2067,8090,31759,127226, 512728,2085944,8530109,35108141,145290427, 603473533,2516899058,10535376447,44235546052, 186238821286,786137476704,3326533736676, 14104293872530,59921599051958,255045546995888, 1087354970834820,4643011158411006] |