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A156632 as a simple table

na(n)
01
1-1
2-72
3433
425992
5-130321
6-22908312
7643258241
837579009032
9-339176516431
10-99038645387352
112185071975446083
12382806071829388872
13-4990689991905448741
14-2040086286878508807192
15245509449031011825040657
1614336987337150554602981512

[1,-1,-72,433,25992,-130321,-22908312,643258241,
 37579009032,-339176516431,-99038645387352,
 2185071975446083,382806071829388872,
 -4990689991905448741,-2040086286878508807192,
 245509449031011825040657,
 14336987337150554602981512]