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A012695 as a simple table

na(n)
02
1-12
2-50
314280
4-826502
5-49633540
625407386758
7-3395749736176
8-840874377633678
9669385496489774468
10-130679263245845309250
11-109382532060795384014888
12114810087622932492884439786

[2,-12,-50,14280,-826502,-49633540,25407386758,
 -3395749736176,-840874377633678,
 669385496489774468,-130679263245845309250,
 -109382532060795384014888,
 114810087622932492884439786]