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A159513 as a simple table

na(n)
01
12
2-446
3-2692
4596716
56039032
6-1330532936
7-18966452272
84153245843856
976585719866912
10-16667474227882976
11-377970687856869952
1281748056052306991296
132204537826531711723392
14-473817052252932475634816
15-14836222411655648808639232
163168592657883982912917729536

[1,2,-446,-2692,596716,6039032,-1330532936,
 -18966452272,4153245843856,76585719866912,
 -16667474227882976,-377970687856869952,
 81748056052306991296,2204537826531711723392,
 -473817052252932475634816,
 -14836222411655648808639232,
 3168592657883982912917729536]