n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 4 |
4 | 14 |
5 | 44 |
6 | 152 |
7 | 514 |
8 | 1866 |
9 | 6884 |
10 | 26137 |
11 | 100442 |
12 | 390592 |
13 | 1526272 |
14 | 5989223 |
15 | 23548688 |
16 | 92727898 |
17 | 365445200 |
18 | 1441195226 |
19 | 5686268314 |
20 | 22444465311 |
21 | 88622259788 |
22 | 350040069245 |
23 | 1383007946774 |
24 | 5465854718664 |
25 | 21607909105528 |
26 | 85444555330132 |
27 | 337962745845558 |
28 | 1337094537703089 |
[0,1,4,14,44,152,514,1866,6884,26137,100442, 390592,1526272,5989223,23548688,92727898, 365445200,1441195226,5686268314,22444465311, 88622259788,350040069245,1383007946774, 5465854718664,21607909105528,85444555330132, 337962745845558,1337094537703089] |