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A131768 as a triangular array

1
31
551
71171
9191991
11293929111
1341696941131
155511113911155151
177116725125116771171
198923941950341923989191

A131768 as a square array

135791113151719
1511192941557189
17193969111167239
192969139251419
11141111251503
11355167419
11571239
11789
119
1
135791113151719
1511192941557189
17193969111167239
192969139251419
11141111251503
11355167419
11571239
11789
119
1