n | a(n) |
---|---|
4 | 1 |
5 | 3 |
6 | 13 |
7 | 45 |
8 | 164 |
9 | 527 |
10 | 1652 |
11 | 4876 |
12 | 14000 |
13 | 38800 |
14 | 105112 |
15 | 278104 |
16 | 722736 |
17 | 1846320 |
18 | 4650368 |
19 | 11560320 |
20 | 28413312 |
21 | 69111168 |
22 | 166551680 |
23 | 397975680 |
24 | 943672576 |
25 | 2221821184 |
26 | 5197313024 |
27 | 12084884480 |
28 | 27944656896 |
29 | 64286203904 |
30 | 147182565376 |
[1,3,13,45,164,527,1652,4876,14000,38800,105112, 278104,722736,1846320,4650368,11560320,28413312, 69111168,166551680,397975680,943672576,2221821184, 5197313024,12084884480,27944656896,64286203904, 147182565376] |