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A266046 as a simple table

na(n)
01
12
22
3-4
4-28
5-88
6-184
7-208
8272
92336
107712
1116832
1221056
13-16768
14-193408
15-673024
16-1531648
17-2088448
18836096
1915875072
2058483712
21138684416
22203835392
23-16764928
24-1290072064
25-5059698688
26-12498362368
27-19635257344
28-3550855168
29103608123392

[1,2,2,-4,-28,-88,-184,-208,272,2336,7712,16832,
 21056,-16768,-193408,-673024,-1531648,-2088448,
 836096,15875072,58483712,138684416,203835392,
 -16764928,-1290072064,-5059698688,-12498362368,
 -19635257344,-3550855168,103608123392]