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A205884 as a simple table

na(n)
01
1-5
210
350
4-180
5-145
6-700
75070
810200
9-34475
1011890
11-344460
12415800
132007660
14-2423460
151950250
16-25895760
1790935120
1896047350
19-662510900
20-239916420
21-2316837900
225593341480
2324756454910
24-27166986000
25-6558690605
26-190008957720
27764537004500

[1,-5,10,50,-180,-145,-700,5070,10200,-34475,
 11890,-344460,415800,2007660,-2423460,1950250,
 -25895760,90935120,96047350,-662510900,-239916420,
 -2316837900,5593341480,24756454910,-27166986000,
 -6558690605,-190008957720,764537004500]