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A263939 as a triangular array

1
12
123
1235
123118
123111713
12311174921
1231117708034
12311177010824955
12311177010842341489
1231117701084836641237144
1231117701084837392667

A263939 as a square array

111111111111
22222222222
3333333333
51111111111111111
817171717171717
13497070707070
2180108108108108
34249423483483
55414664739
8912372667
144
111111111111
22222222222
3333333333
51111111111111111
817171717171717
13497070707070
2180108108108108
34249423483483
55414664739
8912372667
144