

A137667


The sequence alternates even and odd integers but also even and odd digits; it is monotonically increasing and a(n) is always the smallest integer fitting the pattern.


0



0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 210, 301, 410, 501, 610, 701, 810, 901, 21010, 30101, 41010, 50101, 61010, 70101, 81010, 90101, 2101010, 3010101, 4101010, 5010101, 6101010, 7010101, 8101010, 9010101, 210101010, 301010101, 410101010, 501010101
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