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A193540 as a simple table

n a(n)
0 1
1 -1
2 9
3 -153
4 4977
5 -261009
6 20039481
7 -2121958377
8 296297348193
9 -52750142341281
10 11662264481073129
11 -3134732109393169593
12 1006734732695870345937
13 -380718482718134681818929
14 167456229155543640166939161
15 -84761007600911799530893148937

[1,-1,9,-153,4977,-261009,20039481,-2121958377,
 296297348193,-52750142341281,11662264481073129,
 -3134732109393169593,1006734732695870345937,
 -380718482718134681818929,
 167456229155543640166939161,
 -84761007600911799530893148937]

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Last modified September 18 20:36 EDT 2019. Contains 327181 sequences. (Running on oeis4.)