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A009659 as a simple table

na(n)
01
13
233
3571
4897
5-2454829
6-541025183
7-111302329717
8-24150003737343
9-5473538199891421
10-1184916732110463071
11-160650662732139980197
1273044130261960254992001
13109307715032177255302278131

[1,3,33,571,897,-2454829,-541025183,-111302329717,
 -24150003737343,-5473538199891421,
 -1184916732110463071,-160650662732139980197,
 73044130261960254992001,
 109307715032177255302278131]