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A097716 as a simple table

na(n)
01
1-1
22
3-17
4124
5-2764
643688
7-1859138
851236656
9-3550889296
10151107728672
11-15494138893232
12941930695305664
13-133994296272170944
1411024086088089751168
15-2077570618897716831248
16222290021402867410844416
17-53603997631397508980982016
187234385689981722178901729792

[1,-1,2,-17,124,-2764,43688,-1859138,51236656,
 -3550889296,151107728672,-15494138893232,
 941930695305664,-133994296272170944,
 11024086088089751168,-2077570618897716831248,
 222290021402867410844416,
 -53603997631397508980982016,
 7234385689981722178901729792]