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A009644 as a simple table

n a(n)
0 0
1 1
2 1
3 4
4 -4
5 55
6 -349
7 3176
8 -31536
9 356981
10 -4486515
11 62124676
12 -939083124
13 15387231899
14 -271629760609
15 5139109612040
16 -103734448063424
17 2225145262126601
18 -50544116286741191
19 1212003840479789476

[0,1,1,4,-4,55,-349,3176,-31536,356981,-4486515,
 62124676,-939083124,15387231899,-271629760609,
 5139109612040,-103734448063424,2225145262126601,
 -50544116286741191,1212003840479789476]

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Last modified May 24 09:26 EDT 2013. Contains 225617 sequences.