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A270676 as a simple table

na(n)
04
14
232
3-20
472
5-44
6136
7-124
8240
9-204
10344
11-300
12440
13-360
14540
15-524
16768
17-732
181000
19-956
201224
21-1132
221408
23-1340
241672
25-1580
261904
27-1756
282040
29-1820
302152
31-2116
322592
33-2556
343080
35-3036
363560
37-3468
384000
39-3932
404520
41-4428
425008
43-4860

[4,4,32,-20,72,-44,136,-124,240,-204,344,-300,440,
 -360,540,-524,768,-732,1000,-956,1224,-1132,1408,
 -1340,1672,-1580,1904,-1756,2040,-1820,2152,-2116,
 2592,-2556,3080,-3036,3560,-3468,4000,-3932,4520,
 -4428,5008,-4860]