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A009091 as a simple table

n a(n)
0 1
1 -1
2 21
3 -597
4 26537
5 -1834249
6 180938109
7 -23781199197
8 3989919982673
9 -830092069266577
10 209479116176732901
11 -62986349633232396261
12 22231865269167169440761
13 -9096170536950779556167833

[1,-1,21,-597,26537,-1834249,180938109,
 -23781199197,3989919982673,-830092069266577,
 209479116176732901,-62986349633232396261,
 22231865269167169440761,
 -9096170536950779556167833]

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Last modified January 25 03:42 EST 2022. Contains 350565 sequences. (Running on oeis4.)