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A079898 as a simple table

na(n)
11
21
30
43
5-7
618
7-70
8144
9-573
101723
11-6890
1213786
13-82714
14165432
15-661724
162646901
17-13234503
1826469012
19-158814070
20317628146
21-1905768872
227623075492
23-30492301966
2460984603940
25-487876831517
261463630494555
27-5854521978216
2823418087912870
29-140508527477218

[1,1,0,3,-7,18,-70,144,-573,1723,-6890,13786,
 -82714,165432,-661724,2646901,-13234503,26469012,
 -158814070,317628146,-1905768872,7623075492,
 -30492301966,60984603940,-487876831517,
 1463630494555,-5854521978216,23418087912870,
 -140508527477218]