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A020338 Doublets: base 10 representation is the juxtaposition of two identical strings. +0
18
11, 22, 33, 44, 55, 66, 77, 88, 99, 1010, 1111, 1212, 1313, 1414, 1515, 1616, 1717, 1818, 1919, 2020, 2121, 2222, 2323, 2424, 2525, 2626, 2727, 2828, 2929, 3030, 3131, 3232, 3333, 3434, 3535, 3636, 3737, 3838, 3939, 4040, 4141, 4242, 4343, 4444, 4545, 4646 (list; graph; listen)
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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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