n | a(n) |
---|---|
1 | 15 |
2 | 40 |
3 | 120 |
4 | 356 |
5 | 1088 |
6 | 3276 |
7 | 10052 |
8 | 30380 |
9 | 93296 |
10 | 282240 |
11 | 866908 |
12 | 2623264 |
13 | 8057756 |
14 | 24384556 |
15 | 74901596 |
16 | 226673608 |
17 | 696270792 |
18 | 2107127204 |
19 | 6472442928 |
20 | 19587617308 |
21 | 60167110388 |
22 | 182084416108 |
23 | 559307110768 |
24 | 1692637810416 |
25 | 5199260845212 |
[15,40,120,356,1088,3276,10052,30380,93296,282240, 866908,2623264,8057756,24384556,74901596, 226673608,696270792,2107127204,6472442928, 19587617308,60167110388,182084416108,559307110768, 1692637810416,5199260845212] |