n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 9 |
4 | 21 |
5 | 49 |
6 | 114 |
7 | 266 |
8 | 620 |
9 | 1446 |
10 | 3372 |
11 | 7864 |
12 | 18340 |
13 | 42772 |
14 | 99752 |
15 | 232640 |
16 | 542560 |
17 | 1265352 |
18 | 2951040 |
19 | 6882384 |
20 | 16051024 |
21 | 37434032 |
22 | 87303264 |
23 | 203607776 |
24 | 474851968 |
25 | 1107444896 |
26 | 2582771648 |
27 | 6023513600 |
28 | 14047976768 |
29 | 32762547648 |
30 | 76408478336 |
[1,4,9,21,49,114,266,620,1446,3372,7864,18340, 42772,99752,232640,542560,1265352,2951040,6882384, 16051024,37434032,87303264,203607776,474851968, 1107444896,2582771648,6023513600,14047976768, 32762547648,76408478336] |