n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 18 |
4 | 56 |
5 | 160 |
6 | 432 |
7 | 1120 |
8 | 2816 |
9 | 6912 |
10 | 16640 |
11 | 39424 |
12 | 92160 |
13 | 212992 |
14 | 487424 |
15 | 1105920 |
16 | 2490368 |
17 | 5570560 |
18 | 12386304 |
19 | 27394048 |
20 | 60293120 |
21 | 132120576 |
22 | 288358400 |
23 | 627048448 |
24 | 1358954496 |
25 | 2936012800 |
26 | 6325010432 |
27 | 13589544960 |
28 | 29125246976 |
[1,5,18,56,160,432,1120,2816,6912,16640,39424, 92160,212992,487424,1105920,2490368,5570560, 12386304,27394048,60293120,132120576,288358400, 627048448,1358954496,2936012800,6325010432, 13589544960,29125246976] |