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A009063 as a simple table

na(n)
01
1-12
22128
3-1586112
43134810368
5-13146370501632
6101503034352652288
7-1310949029247657295872
826429820982888342672703488
9-788858770066309331711165202432
1033443475995623429145380539537031168

[1,-12,2128,-1586112,3134810368,-13146370501632,
 101503034352652288,-1310949029247657295872,
 26429820982888342672703488,
 -788858770066309331711165202432,
 33443475995623429145380539537031168]