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A086942
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a(n) = k where R(k+8)=4.
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2
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32, 392, 3992, 39992, 399992, 3999992, 39999992, 399999992, 3999999992, 39999999992, 399999999992, 3999999999992, 39999999999992, 399999999999992, 3999999999999992, 39999999999999992, 399999999999999992
(list; graph; refs; listen; history; internal format)
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