n | a(n) |
---|---|
1 | 1 |
2 | 8 |
3 | 52 |
4 | 296 |
5 | 1556 |
6 | 7768 |
7 | 37416 |
8 | 175568 |
9 | 807604 |
10 | 3657464 |
11 | 16357496 |
12 | 72407728 |
13 | 317777032 |
14 | 1384524656 |
15 | 5994736336 |
16 | 25816193952 |
17 | 110652549620 |
18 | 472302724408 |
19 | 2008499580504 |
20 | 8513063608304 |
21 | 35975584631128 |
22 | 151621915797840 |
[1,8,52,296,1556,7768,37416,175568,807604,3657464, 16357496,72407728,317777032,1384524656,5994736336, 25816193952,110652549620,472302724408, 2008499580504,8513063608304,35975584631128, 151621915797840] |