n | a(n) |
---|---|
1 | 2 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 11 |
6 | 27 |
7 | 53 |
8 | 133 |
9 | 310 |
10 | 691 |
11 | 1722 |
12 | 4898 |
13 | 13169 |
14 | 31188 |
15 | 68247 |
16 | 151695 |
17 | 355719 |
18 | 880650 |
19 | 2386625 |
20 | 7052660 |
21 | 20845775 |
22 | 57431942 |
23 | 145661869 |
24 | 346176887 |
25 | 792710311 |
26 | 1828054653 |
27 | 4509979089 |
28 | 12381748520 |
29 | 37284100779 |
30 | 117101693844 |
31 | 362950924700 |
[2,1,2,6,11,27,53,133,310,691,1722,4898,13169, 31188,68247,151695,355719,880650,2386625,7052660, 20845775,57431942,145661869,346176887,792710311, 1828054653,4509979089,12381748520,37284100779, 117101693844,362950924700] |