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A289944 as a triangular array

1
11
111
1112
11122
111223
1112234
22233344
133344556
1144456678
223557788911
13347771011121213

A289944 as a square array

111111121121
11111123123
1111123433
222233454
22234457
3334577
445677
456810
67811
8912
1112
13
111111121121
11111123123
1111123433
222233454
22234457
3334577
445677
456810
67811
8912
1112
13