n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 2 |
8 | 5 |
9 | 10 |
10 | 17 |
11 | 30 |
12 | 77 |
13 | 254 |
14 | 873 |
15 | 2865 |
16 | 9282 |
17 | 36476 |
18 | 176379 |
19 | 950600 |
20 | 5334620 |
21 | 30998066 |
22 | 200015663 |
23 | 1516056134 |
24 | 12927161092 |
25 | 120013319909 |
26 | 1186872290095 |
27 | 12868902178120 |
28 | 156796551881590 |
[1,1,1,1,1,1,2,5,10,17,30,77,254,873,2865,9282, 36476,176379,950600,5334620,30998066,200015663, 1516056134,12927161092,120013319909,1186872290095, 12868902178120,156796551881590] |