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A081485 as a triangular array

1
13
123
1357
123519
13571319
123571113
135711131723
1235711131731
1357111317192331
12357111317192331
13571113171923294147
12357111317

A081485 as a square array

1111111111111
323232323232
35353535353
7575757575
19137117117117
1911131113111311
13171317131713
231719171917
31231923
312329
3141
47
1111111111111
323232323232
35353535353
7575757575
19137117117117
1911131113111311
13171317131713
231719171917
31231923
312329
3141
47