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A156873 as a simple table

na(n)
01
1-4
2-57
3299
430837
5-292681
6-44960517
7602623139
8123352145097
9-2127680509201
10-544363629609777
1111477378893703579
123523737902837036157
13-87803678236749285721
14-31449956002350199275837
15904227259824093176473619
16370149219545412046573408017

[1,-4,-57,299,30837,-292681,-44960517,602623139,
 123352145097,-2127680509201,-544363629609777,
 11477378893703579,3523737902837036157,
 -87803678236749285721,-31449956002350199275837,
 904227259824093176473619,
 370149219545412046573408017]