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A126126 as a triangular array

1
-11
2-41
-513-71
13-4033-101
-34120-13262-131
89-354483-308100-161
-2331031-16711345-595147-191
610-29725561-53983030-1020203-221
-15978495-1798420410-138935943-1610268-251
4181-2411056886-7381659059-3070210570-2392342-281

A126126 as a square array

1-12-513-3489-233610-15974181
1-413-40120-3541031-29728495-24110
1-733-132483-16715561-1798456886
1-1062-3081345-539820410-73816
1-13100-5953030-1389359059
1-16147-10205943-30702
1-19203-161010570
1-22268-2392
1-25342
1-28
1
1-12-513-3489-233610-15974181
1-413-40120-3541031-29728495-24110
1-733-132483-16715561-1798456886
1-1062-3081345-539820410-73816
1-13100-5953030-1389359059
1-16147-10205943-30702
1-19203-161010570
1-22268-2392
1-25342
1-28
1