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A089561
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Concatenations arising in A089560.
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1
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1, 31, 431, 5431, 75431, 1475431, 91475431, 691475431, 57691475431, 1357691475431, 181357691475431, 17181357691475431, 1617181357691475431, 121617181357691475431, 20121617181357691475431
(list; graph; refs; listen; history; internal format)
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