n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 23 |
7 | 60 |
8 | 170 |
9 | 496 |
10 | 1505 |
11 | 4665 |
12 | 14772 |
13 | 47415 |
14 | 154093 |
15 | 505394 |
16 | 1671009 |
17 | 5561274 |
18 | 18615687 |
19 | 62624016 |
20 | 211605003 |
21 | 717823582 |
22 | 2443711716 |
23 | 8345934897 |
24 | 28587110560 |
25 | 98181058020 |
26 | 338029066457 |
27 | 1166451261583 |
28 | 4033596172701 |
29 | 13975467586797 |
30 | 48509872173875 |
[1,1,2,4,9,23,60,170,496,1505,4665,14772,47415, 154093,505394,1671009,5561274,18615687,62624016, 211605003,717823582,2443711716,8345934897, 28587110560,98181058020,338029066457, 1166451261583,4033596172701,13975467586797, 48509872173875] |