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A212829 as a triangular array

1
12
124
1256
1251210
125133316
12513439026
125134415224642
125134416755967268
125134416869520911836110
1251344168716307078825016178
1251344168717

A212829 as a square array

111111111111
22222222222
4555555555
61213131313131313
1033434444444444
1690152167168168168
26246559695716717
4267220913070
6818367882
1105016
178
111111111111
22222222222
4555555555
61213131313131313
1033434444444444
1690152167168168168
26246559695716717
4267220913070
6818367882
1105016
178