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A128210 as a triangular array

1
-11
1-11
-33-31
15-1515-51
-165165-16555-111
3465-34653465-1155231-211
-148995148995-14899549665-9933903-431
12664575-1266457512664575

A128210 as a square array

1-11-315-1653465-14899512664575
1-13-15165-3465148995-12664575
1-315-1653465-14899512664575
1-555-115549665
1-11231-9933
1-21903
1-43
1
1-11-315-1653465-14899512664575
1-13-15165-3465148995-12664575
1-315-1653465-14899512664575
1-555-115549665
1-11231-9933
1-21903
1-43
1