n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 23 |
6 | 67 |
7 | 199 |
8 | 600 |
9 | 1834 |
10 | 5674 |
11 | 17743 |
12 | 56011 |
13 | 178301 |
14 | 571812 |
15 | 1845913 |
16 | 5993985 |
17 | 19565770 |
18 | 64168531 |
19 | 211343740 |
20 | 698753053 |
21 | 2318315786 |
22 | 7716186315 |
23 | 25757105801 |
24 | 86208990248 |
25 | 289253059765 |
26 | 972729789813 |
[1,1,3,8,23,67,199,600,1834,5674,17743,56011, 178301,571812,1845913,5993985,19565770,64168531, 211343740,698753053,2318315786,7716186315, 25757105801,86208990248,289253059765,972729789813] |