n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 11 |
3 | 41 |
4 | 152 |
5 | 561 |
6 | 2067 |
7 | 7618 |
8 | 28118 |
9 | 104006 |
10 | 385662 |
11 | 1433797 |
12 | 5344510 |
13 | 19973085 |
14 | 74827395 |
15 | 281000430 |
16 | 1057628550 |
17 | 3989213610 |
18 | 15077120010 |
19 | 57092280570 |
20 | 216579650664 |
21 | 822991216746 |
22 | 3132339521966 |
23 | 11939881979076 |
24 | 45577753704252 |
25 | 174218415470092 |
26 | 666795041653916 |
[1,3,11,41,152,561,2067,7618,28118,104006,385662, 1433797,5344510,19973085,74827395,281000430, 1057628550,3989213610,15077120010,57092280570, 216579650664,822991216746,3132339521966, 11939881979076,45577753704252,174218415470092, 666795041653916] |