n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 7 |
6 | 21 |
7 | 61 |
8 | 187 |
9 | 577 |
10 | 1825 |
11 | 5831 |
12 | 18883 |
13 | 61699 |
14 | 203429 |
15 | 675545 |
16 | 2258291 |
17 | 7592249 |
18 | 25656477 |
19 | 87096661 |
20 | 296891287 |
21 | 1015797379 |
22 | 3487272317 |
23 | 12008898531 |
24 | 41471260883 |
25 | 143588078449 |
26 | 498343911529 |
27 | 1733410858955 |
28 | 6041795275027 |
29 | 21098924740155 |
[0,1,1,1,3,7,21,61,187,577,1825,5831,18883,61699, 203429,675545,2258291,7592249,25656477,87096661, 296891287,1015797379,3487272317,12008898531, 41471260883,143588078449,498343911529, 1733410858955,6041795275027,21098924740155] |