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A054123 as a triangular array

1
11
111
1211
13211
144211
1574211
161184211
17161584211
1822261684211
192942311684211
110376457321684211
11146939963321684211
11256

A054123 as a square array

11111111111111
1123456789101112
1124711162229374656
112481526426493
1124816315799
11248163263
112481632
1124816
11248
1124
112
11
1
11111111111111
1123456789101112
1124711162229374656
112481526426493
1124816315799
11248163263
112481632
1124816
11248
1124
112
11
1