n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 24 |
4 | 181 |
5 | 941 |
6 | 4662 |
7 | 23691 |
8 | 119271 |
9 | 603760 |
10 | 3050402 |
11 | 15428576 |
12 | 78004550 |
13 | 394462578 |
14 | 1994595585 |
15 | 10086050889 |
16 | 51001111356 |
17 | 257894037378 |
18 | 1304071170194 |
19 | 6594196094078 |
20 | 33344335235915 |
21 | 168609627579175 |
22 | 852594638783225 |
23 | 4311246376730011 |
[1,6,24,181,941,4662,23691,119271,603760,3050402, 15428576,78004550,394462578,1994595585, 10086050889,51001111356,257894037378, 1304071170194,6594196094078,33344335235915, 168609627579175,852594638783225,4311246376730011] |