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A046416
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Repunit of length a(n) has exactly 5 prime factors (counted with multiplicity).
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0
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6, 25, 29, 62, 89, 134, 137, 142, 151, 179, 239, 257, 271, 277
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..14.
Eric Weisstein's World of Mathematics, Repunit
P. De Geest, Repunits prime factors
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CROSSREFS
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Cf. A000042, A004022, A046053.
Sequence in context: A136606 A074096 A126016 * A042879 A042495 A018198
Adjacent sequences: A046413 A046414 A046415 * A046417 A046418 A046419
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KEYWORD
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nonn,more
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AUTHOR
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Patrick De Geest, Jul 15 1998.
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EXTENSIONS
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More terms from Robert Gerbicz, Nov 22 2010
a(14) by Bo Gyu Jeong, Jun 30 2012
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STATUS
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approved
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