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A123967 as a simple table

na(n)
01
1-5
21
324
4-10
51
6-115
773
8-15
91
10551
11-470
12147
13-20
141
15-2640
162828
17-1190
18246
19-25
201
2112649
22-16310
238631
24-2400
25370
26-30
271
28-60605
2991371
30-58275
3120385
32-4225
33519
34-35
351
36290376
37-501150
38374115
39-157800
4041140
41-6790
42693
43-40
441
45-1391275
462704755
47-2313450
481142730
49-359275
5074571
51-10220
52892
53-45
541

[1,-5,1,24,-10,1,-115,73,-15,1,551,-470,147,-20,1,
 -2640,2828,-1190,246,-25,1,12649,-16310,8631,
 -2400,370,-30,1,-60605,91371,-58275,20385,-4225,
 519,-35,1,290376,-501150,374115,-157800,41140,
 -6790,693,-40,1,-1391275,2704755,-2313450,1142730,
 -359275,74571,-10220,892,-45,1]