n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | -3 |
4 | 4 |
5 | -20 |
6 | 230 |
7 | -1911 |
8 | 12920 |
9 | -104040 |
10 | 1058458 |
11 | -11889955 |
12 | 141336380 |
13 | -1804017852 |
14 | 24962731950 |
15 | -371663464095 |
16 | 5900573560752 |
17 | -99478198783184 |
18 | 1776396441716658 |
19 | -33501559023746883 |
20 | 665305926036550324 |
[0,0,2,-3,4,-20,230,-1911,12920,-104040,1058458, -11889955,141336380,-1804017852,24962731950, -371663464095,5900573560752,-99478198783184, 1776396441716658,-33501559023746883, 665305926036550324] |