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Search: id:A086930
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| A086930 |
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Smallest b>1 such that in base b representation the n-th prime is a repunit. |
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+0
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| 2, 4, 2, 10, 3, 16, 18, 22, 28, 2, 36, 40, 6, 46, 52, 58, 60, 66, 70, 8, 78, 82, 88, 96, 100, 102, 106, 108, 112, 2, 130, 136, 138, 148, 150, 12, 162, 166, 172, 178, 180, 190, 192, 196, 198, 14, 222, 226, 228, 232, 238, 15, 250, 256, 262, 268, 270, 276, 280, 282
(list; graph; listen)
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OFFSET
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2,1
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LINKS
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Eric Weisstein's World of Mathematics, Repunit
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EXAMPLE
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n=6: A000040(6) = 13 = 3^2 + 3^1 + 3^0: ternary(13)='111', and binary(13)='1101', therefore a(6)=3.
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CROSSREFS
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Cf. A000225, A003462, A002450, A003463, A003464, A023000, A023001, A002452, A002275, A004022, A016123, A016125.
Adjacent sequences: A086927 A086928 A086929 this_sequence A086931 A086932 A086933
Sequence in context: A072866 A061393 A055935 this_sequence A099585 A097577 A097692
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KEYWORD
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nonn,base
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 21 2003
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