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A015378 as a simple table

na(n)
91
10-8638025
1189538572808355
12-898184256176675135525
139058617560471271225871839115
14-91278255494743382265330154281509525
15919894226814090294609303909820267635374635
16-9270381253910297854571803793049953719997957501525

[1,-8638025,89538572808355,-898184256176675135525,
 9058617560471271225871839115,
 -91278255494743382265330154281509525,
 919894226814090294609303909820267635374635,
 -9270381253910297854571803793049953719997957501525\
 ]