

A106003


Keep only the middle digit of each integer and concatenate them. The result is the concatenation of all integers of the sequence.


1



0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 110, 111, 200, 210, 211, 212, 220, 300, 400, 420, 510, 600, 620, 710, 711, 720, 810, 820, 822, 823, 900, 930, 10000, 10001, 10400, 11000, 11001, 11400, 12200, 13000, 13500, 14100, 15000, 15600, 16000, 16001, 16600, 17200
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