n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 12 |
4 | 24 |
5 | 82 |
6 | 232 |
7 | 654 |
8 | 2044 |
9 | 6096 |
10 | 18564 |
11 | 57500 |
12 | 177032 |
13 | 550098 |
14 | 1715956 |
15 | 5359158 |
16 | 16799508 |
17 | 52760640 |
18 | 165976252 |
19 | 523094304 |
20 | 1650781728 |
21 | 5216112586 |
22 | 16501009804 |
23 | 52252555938 |
24 | 165618780196 |
25 | 525388548976 |
26 | 1667965025692 |
[1,4,12,24,82,232,654,2044,6096,18564,57500, 177032,550098,1715956,5359158,16799508,52760640, 165976252,523094304,1650781728,5216112586, 16501009804,52252555938,165618780196,525388548976, 1667965025692] |