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A015123 as a triangular array

1
11
1-91
191911
1-9099191-9091
1909191819191819190911
1-9090991828191-91727280991828191-909091
1909091918272819191736463719191736463719191827281919090911
1-9090909918273728191

A015123 as a square array

111111111
1-991-9099091-90909909091-9090909
1919191918191918281919182728191918273728191
1-909918191-917272809917364637191
1909191828191917364637191
1-909099182728191
1909091
1

A015123 as an upper right triangle

111111111
1-991-9099091-90909909091-9090909
1919191918191918281919182728191918273728191
1-909918191-917272809917364637191
1909191828191917364637191
1-909099182728191
1909091
1

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Last modified April 20 16:17 EDT 2019. Contains 322310 sequences. (Running on oeis4.)