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A174731 as a triangular array

1
11
1-131
1-74-741
1-278-588-2781
1-881-3086-3086-8811
1-2539-13207-22097-13207-25391
1-6884-49724-124694-124694-49724-68841
1-17884-171184-600424-900892-600424-171184-178841

A174731 as a square array

111111111
1-13-74-278-881-2539-6884-17884
1-74-588-3086-13207-49724-171184
1-278-3086-22097-124694-600424
1-881-13207-124694-900892
1-2539-49724-600424
1-6884-171184
1-17884
1
111111111
1-13-74-278-881-2539-6884-17884
1-74-588-3086-13207-49724-171184
1-278-3086-22097-124694-600424
1-881-13207-124694-900892
1-2539-49724-600424
1-6884-171184
1-17884
1