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A012033 as a simple table

na(n)
01
1-1
25
3-13
4-407
530151
6-1142483
719202427
83747342929
9-722092683505
1076341208430549
11-2313301317273981
12-1769780901329435719
13628518840135423728599
14-125498832189487922441219

[1,-1,5,-13,-407,30151,-1142483,19202427,
 3747342929,-722092683505,76341208430549,
 -2313301317273981,-1769780901329435719,
 628518840135423728599,-125498832189487922441219]