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A172090 as a triangular array

1
11
121
1111
11011
110011
1100011
11000011
110000011
1100000011
11000000011

A172090 as a square array

11111111111
1211111111
110000000
11000000
1100000
110000
11000
1100
110
11
1

A172090 as an upper right triangle

11111111111
1211111111
110000000
11000000
1100000
110000
11000
1100
110
11
1

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Last modified July 2 08:50 EDT 2020. Contains 335398 sequences. (Running on oeis4.)