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A025172 formatted as a simple table:

n a(n)
0 1
1 1
2 -7
3 -23
4 17
5 241
6 329
7 -1511
8 -5983
9 1633
10 57113
11 99529
12 -314959
13 -1525679
14 -216727
15 13297657
16 28545857
17 -62587199
18 -382087111
19 -200889431
20 3037005137
21 7882015153
22 -11569015927
23 -94076168231
24 -84031193119
25 678623127841
26 2113526993753

[1,1,-7,-23,17,241,329,-1511,-5983,1633,57113,
 99529,-314959,-1525679,-216727,13297657,28545857,
 -62587199,-382087111,-200889431,3037005137,
 7882015153,-11569015927,-94076168231,-84031193119,
 678623127841,2113526993753]

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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