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A106656
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Smallest semiprime ending in exactly n 1's.
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0
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21, 411, 111, 1111, 11111, 2111111, 1111111, 211111111, 2111111111, 21111111111, 11111111111, 4111111111111, 121111111111111, 511111111111111, 2111111111111111, 81111111111111111, 11111111111111111
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(2)=411 is a term because 411 is the smallest semiprime ending in exactly two 1's.
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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STATUS
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approved
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