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

A013211 as a simple table

na(n)
00
10
2-1
33
4-6
523
6-135
71036
8-8820
979253
10-790965
119009946
12-115646454
131626322631
14-24603654075
15399276204328
16-6962632196520
17130208290075961
18-2596473574347177
1954889573679035678

[0,0,-1,3,-6,23,-135,1036,-8820,79253,-790965,
 9009946,-115646454,1626322631,-24603654075,
 399276204328,-6962632196520,130208290075961,
 -2596473574347177,54889573679035678]