n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 21 |
5 | 61 |
6 | 191 |
7 | 603 |
8 | 1961 |
9 | 6457 |
10 | 21595 |
11 | 72975 |
12 | 249085 |
13 | 857013 |
14 | 2970007 |
15 | 10356323 |
16 | 36311633 |
17 | 127937649 |
18 | 452738867 |
19 | 1608426647 |
20 | 5734534629 |
21 | 20511509549 |
22 | 73583105007 |
23 | 264687136235 |
24 | 954482676217 |
25 | 3449853902761 |
26 | 12495597328011 |
27 | 45349353908383 |
[1,1,3,7,21,61,191,603,1961,6457,21595,72975, 249085,857013,2970007,10356323,36311633,127937649, 452738867,1608426647,5734534629,20511509549, 73583105007,264687136235,954482676217, 3449853902761,12495597328011,45349353908383] |