n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 18 |
5 | 61 |
6 | 223 |
7 | 835 |
8 | 3296 |
9 | 13280 |
10 | 54828 |
11 | 230937 |
12 | 986261 |
13 | 4275360 |
14 | 18729877 |
15 | 82912159 |
16 | 370207793 |
17 | 1665674199 |
18 | 7546473001 |
19 | 34395212088 |
20 | 157636435318 |
21 | 725993948563 |
22 | 3358579055113 |
23 | 15600331684473 |
24 | 72730708595232 |
25 | 340230220394416 |
26 | 1596525730756138 |
27 | 7513179574478844 |
28 | 35450185529339379 |
[1,1,2,6,18,61,223,835,3296,13280,54828,230937, 986261,4275360,18729877,82912159,370207793, 1665674199,7546473001,34395212088,157636435318, 725993948563,3358579055113,15600331684473, 72730708595232,340230220394416,1596525730756138, 7513179574478844,35450185529339379] |