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A010835 as a simple table

na(n)
01
1-30
2405
3-3190
415660
5-45036
640745
7222750
8-974835
91334580
101547469
11-8174520
128380245
139200250
14-23243355
15-2643380
1614704740
1782050570
18-116275500
19-195804810
20442809990
2125147930
22-371898000
23-313802910
24125394405
251688931000
26-1364323095
27-737497840
28158838945
29-1653918750
306309965146
31-1076120370

[1,-30,405,-3190,15660,-45036,40745,222750,
 -974835,1334580,1547469,-8174520,8380245,9200250,
 -23243355,-2643380,14704740,82050570,-116275500,
 -195804810,442809990,25147930,-371898000,
 -313802910,125394405,1688931000,-1364323095,
 -737497840,158838945,-1653918750,6309965146,
 -1076120370]