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A011794 as a triangular array

1
12
123
1345
13678
147111213
141014192021
15112126323334
1515254046535455
161636517279878889
1621417697125133142143144
17225792148176212221231232233

A011794 as a square array

111111111111
22334455667
3467101115162122
5711142125364157
812192640517692
132032467297148
21335379125176
345487133212
5588142221
89143231
144232
233
111111111111
22334455667
3467101115162122
5711142125364157
812192640517692
132032467297148
21335379125176
345487133212
5588142221
89143231
144232
233