n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 7 |
4 | 17 |
5 | 47 |
6 | 110 |
7 | 250 |
8 | 538 |
9 | 1123 |
10 | 2278 |
11 | 4522 |
12 | 8812 |
13 | 16911 |
14 | 32031 |
15 | 59991 |
16 | 111263 |
17 | 204593 |
18 | 373370 |
19 | 676800 |
20 | 1219440 |
21 | 2185251 |
22 | 3896796 |
23 | 6917892 |
24 | 12231192 |
25 | 21544717 |
26 | 37819885 |
27 | 66179335 |
28 | 115464893 |
29 | 200906723 |
30 | 348688838 |
[1,1,7,17,47,110,250,538,1123,2278,4522,8812, 16911,32031,59991,111263,204593,373370,676800, 1219440,2185251,3896796,6917892,12231192,21544717, 37819885,66179335,115464893,200906723,348688838] |