n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 24 |
4 | 80 |
5 | 240 |
6 | 672 |
7 | 1792 |
8 | 4608 |
9 | 11520 |
10 | 28160 |
11 | 67584 |
12 | 159744 |
13 | 372736 |
14 | 860160 |
15 | 1966080 |
16 | 4456448 |
17 | 10027008 |
18 | 22413312 |
19 | 49807360 |
20 | 110100480 |
21 | 242221056 |
22 | 530579456 |
23 | 1157627904 |
24 | 2516582400 |
25 | 5452595200 |
26 | 11777605632 |
27 | 25367150592 |
28 | 54492397568 |
29 | 116769423360 |
30 | 249644974080 |
31 | 532575944704 |
[0,1,6,24,80,240,672,1792,4608,11520,28160,67584, 159744,372736,860160,1966080,4456448,10027008, 22413312,49807360,110100480,242221056,530579456, 1157627904,2516582400,5452595200,11777605632, 25367150592,54492397568,116769423360,249644974080, 532575944704] |