n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 10 |
3 | 40 |
4 | 82 |
5 | 328 |
6 | 820 |
7 | 3280 |
8 | 6562 |
9 | 26248 |
10 | 65620 |
11 | 262480 |
12 | 538084 |
13 | 2152336 |
14 | 5380840 |
15 | 21523360 |
16 | 43046722 |
17 | 172186888 |
18 | 430467220 |
19 | 1721868880 |
20 | 3529831204 |
21 | 14119324816 |
22 | 35298312040 |
23 | 141193248160 |
24 | 282472589764 |
25 | 1129890359056 |
[1,4,10,40,82,328,820,3280,6562,26248,65620, 262480,538084,2152336,5380840,21523360,43046722, 172186888,430467220,1721868880,3529831204, 14119324816,35298312040,141193248160,282472589764, 1129890359056] |