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A174173 as a simple table

na(n)
1123
21234
31234567
412345678901
512345678901234567
6123456789012345678901234567
71234567890123456789012345678901

[123,1234,1234567,12345678901,12345678901234567,
 123456789012345678901234567,
 1234567890123456789012345678901]