n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 8 |
4 | 44 |
5 | 208 |
6 | 912 |
7 | 3840 |
8 | 15808 |
9 | 64256 |
10 | 259328 |
11 | 1042432 |
12 | 4180992 |
13 | 16748544 |
14 | 67047424 |
15 | 268304384 |
16 | 1073463296 |
17 | 4294377472 |
18 | 17178624000 |
19 | 68716855296 |
20 | 274872401920 |
21 | 1099500093440 |
22 | 4398022393856 |
23 | 17592135712768 |
24 | 70368639320064 |
[0,0,1,8,44,208,912,3840,15808,64256,259328, 1042432,4180992,16748544,67047424,268304384, 1073463296,4294377472,17178624000,68716855296, 274872401920,1099500093440,4398022393856, 17592135712768,70368639320064] |