n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 3 |
6 | 6 |
7 | 12 |
8 | 27 |
9 | 65 |
10 | 175 |
11 | 490 |
12 | 1473 |
13 | 4588 |
14 | 14782 |
15 | 48678 |
16 | 163414 |
17 | 555885 |
18 | 1913334 |
19 | 6646728 |
20 | 23278989 |
21 | 82100014 |
22 | 291361744 |
23 | 1039758962 |
24 | 3729276257 |
25 | 13437206032 |
26 | 48620868106 |
27 | 176611864312 |
28 | 643834562075 |
29 | 2354902813742 |
30 | 8640039835974 |
31 | 31791594259244 |
[1,1,1,2,3,6,12,27,65,175,490,1473,4588,14782, 48678,163414,555885,1913334,6646728,23278989, 82100014,291361744,1039758962,3729276257, 13437206032,48620868106,176611864312,643834562075, 2354902813742,8640039835974,31791594259244] |