n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | -3 |
4 | 6 |
5 | -12 |
6 | 25 |
7 | -48 |
8 | 98 |
9 | -195 |
10 | 390 |
11 | -780 |
12 | 1561 |
13 | -3120 |
14 | 6242 |
15 | -12483 |
16 | 24966 |
17 | -49932 |
18 | 99865 |
19 | -199728 |
20 | 399458 |
21 | -798915 |
22 | 1597830 |
23 | -3195660 |
24 | 6391321 |
25 | -12782640 |
26 | 25565282 |
27 | -51130563 |
28 | 102261126 |
29 | -204522252 |
30 | 409044505 |
31 | -818089008 |
32 | 1636178018 |
33 | -3272356035 |
34 | 6544712070 |
[1,0,2,-3,6,-12,25,-48,98,-195,390,-780,1561, -3120,6242,-12483,24966,-49932,99865,-199728, 399458,-798915,1597830,-3195660,6391321,-12782640, 25565282,-51130563,102261126,-204522252,409044505, -818089008,1636178018,-3272356035,6544712070] |