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A098331 formatted as a simple table:

n a(n)
0 1
1 1
2 -1
3 -5
4 -5
5 11
6 41
7 29
8 -125
9 -365
10 -131
11 1409
12 3301
13 -155
14 -15625
15 -29485
16 16115
17 170035
18 254525
19 -309775
20 -1813055
21 -2064655
22 4617755
23 18909175
24 14903725
25 -61552739
26 -192390589
27 -81290561
28 767919595
29 1901796395
30 28588201

[1,1,-1,-5,-5,11,41,29,-125,-365,-131,1409,3301,
 -155,-15625,-29485,16115,170035,254525,-309775,
 -1813055,-2064655,4617755,18909175,14903725,
 -61552739,-192390589,-81290561,767919595,
 1901796395,28588201]

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.


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