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A321027 as a simple table

na(n)
01
1-2
26
3-14
428
5-58
6114
7-210
8384
9-684
101178
11-2010
123372
13-5538
149006
15-14466
1622906
17-35954
1855884
19-85946
20131176
21-198622
22298274
23-444958
24659368
25-970544
261420362
27-2066876
282990680
29-4305598
306168154
31-8793554
3212480718
33-17637250
3424818530
35-34785622

[1,-2,6,-14,28,-58,114,-210,384,-684,1178,-2010,
 3372,-5538,9006,-14466,22906,-35954,55884,-85946,
 131176,-198622,298274,-444958,659368,-970544,
 1420362,-2066876,2990680,-4305598,6168154,
 -8793554,12480718,-17637250,24818530,-34785622]