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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A012387 as a simple table

na(n)
00
12
216
3152
4-5504
5-1107808
6-155757824
7-22741022848
8-3557729644544

[0,2,16,152,-5504,-1107808,-155757824,
 -22741022848,-3557729644544]