n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 17 |
4 | 80 |
5 | 384 |
6 | 1887 |
7 | 9385 |
8 | 47139 |
9 | 238488 |
10 | 1213588 |
11 | 6204547 |
12 | 31844710 |
13 | 163978344 |
14 | 846741721 |
15 | 4382945317 |
16 | 22735196277 |
17 | 118151632006 |
18 | 615032941924 |
19 | 3206257881171 |
20 | 16736910271178 |
21 | 87472908459696 |
22 | 457662760258109 |
23 | 2396899780970552 |
24 | 12564645719730297 |
[1,1,4,17,80,384,1887,9385,47139,238488,1213588, 6204547,31844710,163978344,846741721,4382945317, 22735196277,118151632006,615032941924, 3206257881171,16736910271178,87472908459696, 457662760258109,2396899780970552, 12564645719730297] |