n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 6 |
3 | 6 |
4 | 16 |
5 | 39 |
6 | 114 |
7 | 335 |
8 | 1081 |
9 | 3574 |
10 | 12408 |
11 | 44076 |
12 | 160915 |
13 | 598244 |
14 | 2263400 |
15 | 8681464 |
16 | 33713947 |
17 | 132305267 |
18 | 524095596 |
19 | 2093208435 |
20 | 8422013745 |
21 | 34110403728 |
22 | 138979989162 |
23 | 569339728312 |
24 | 2343898451275 |
25 | 9693334574919 |
[1,3,6,6,16,39,114,335,1081,3574,12408,44076, 160915,598244,2263400,8681464,33713947,132305267, 524095596,2093208435,8422013745,34110403728, 138979989162,569339728312,2343898451275, 9693334574919] |