n | a(n) |
---|---|
1 | -2 |
2 | 0 |
3 | 10 |
4 | 48 |
5 | 178 |
6 | 600 |
7 | 1930 |
8 | 6048 |
9 | 18658 |
10 | 57000 |
11 | 173050 |
12 | 523248 |
13 | 1577938 |
14 | 4750200 |
15 | 14283370 |
16 | 42915648 |
17 | 128878018 |
18 | 386896200 |
19 | 1161212890 |
20 | 3484687248 |
21 | 10456158898 |
22 | 31372671000 |
23 | 94126401610 |
24 | 282395982048 |
25 | 847221500578 |
26 | 2541731610600 |
27 | 7625329049530 |
[-2,0,10,48,178,600,1930,6048,18658,57000,173050, 523248,1577938,4750200,14283370,42915648, 128878018,386896200,1161212890,3484687248, 10456158898,31372671000,94126401610,282395982048, 847221500578,2541731610600,7625329049530] |