n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 14 |
4 | 81 |
5 | 538 |
6 | 3926 |
7 | 30694 |
8 | 252939 |
9 | 2172830 |
10 | 19304190 |
11 | 176343390 |
12 | 1649008456 |
13 | 15730575554 |
14 | 152663683494 |
15 | 1503962954930 |
16 | 15012865733351 |
17 | 151622652413194 |
18 | 1547365078534578 |
19 | 15939972379349178 |
20 | 165597452660771610 |
21 | 1733609081727968492 |
[1,1,3,14,81,538,3926,30694,252939,2172830, 19304190,176343390,1649008456,15730575554, 152663683494,1503962954930,15012865733351, 151622652413194,1547365078534578, 15939972379349178,165597452660771610, 1733609081727968492] |