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A274773 as a triangular array

1
13
133
1353
13553
135753
1357753
13579753
135799753
13579119753
1357911119753
135791113119753
13579111313119753
1357911131513119753
135791113151513119753

A274773 as a square array

111111111111111
33333333333333
3555555555555
357777777777
35799999999
3579111111111111
35791113131313
357911131515
3579111315
35791113
357911
3579
357
35
3
111111111111111
33333333333333
3555555555555
357777777777
35799999999
3579111111111111
35791113131313
357911131515
3579111315
35791113
357911
3579
357
35
3