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A271914 as a triangular array

1
22
323
4444
54445
655556
7666667
87877878
988888889
10910999910910

A271914 as a square array

12345678910
224456789
344568810
4456789
556789
66889
7789
8810
99
10
12345678910
224456789
344568810
4456789
556789
66889
7789
8810
99
10