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A013569 as a simple table

na(n)
01
11
2-1
3-1
49
5-15
6-25
7471
8-1295
93329
1065647
11-98129
123713721
1333219953
14270347415
156061172807
1668349644129
171202915380097
1819022739778399
19352452078288991
206138793986311401
21130474490203385201

[1,1,-1,-1,9,-15,-25,471,-1295,3329,65647,-98129,
 3713721,33219953,270347415,6061172807,68349644129,
 1202915380097,19022739778399,352452078288991,
 6138793986311401,130474490203385201]