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A064188 as a simple table

na(n)
01
11
23
34
48
512
618
727
840
958
1083
11118
12195
13242
14-1387
15-338
1675876
1744491
18-3099115
19-2028539
20129829195
2191749709
22-5687984421
23-4236497556
24263653557716
25204087552038
26-12979768392096
27-10348229609729
28679042377362009
29554161706136054
30-37712174126966326

[1,1,3,4,8,12,18,27,40,58,83,118,195,242,-1387,
 -338,75876,44491,-3099115,-2028539,129829195,
 91749709,-5687984421,-4236497556,263653557716,
 204087552038,-12979768392096,-10348229609729,
 679042377362009,554161706136054,
 -37712174126966326]