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A050716
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Inserting a digit '6' between all adjacent digits of n makes a prime.
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10
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13, 17, 23, 29, 37, 41, 43, 47, 53, 59, 61, 71, 79, 83, 97, 101, 103, 107, 109, 127, 131, 133, 139, 151, 157, 161, 173, 193, 211, 221, 223, 227, 251, 269, 281, 283, 301, 307, 311, 323, 329, 347, 349, 353, 371, 377, 401, 421, 457, 463, 479, 481, 487, 517, 523
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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LINKS
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Harvey P. Dale, Table of n, a(n) for n = 0..1000
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EXAMPLE
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481 becomes 4(6)8(6)1 becomes prime 46861.
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MATHEMATICA
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Select[Range[10, 600], PrimeQ[FromDigits[Riffle[IntegerDigits[#], 6]]]&] (* Harvey P. Dale, Aug 26 2013 *)
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CROSSREFS
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Cf. A050674, A050711-A050719.
Sequence in context: A274321 A316603 A235914 * A217046 A141076 A092146
Adjacent sequences: A050713 A050714 A050715 * A050717 A050718 A050719
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KEYWORD
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nonn,base
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AUTHOR
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Patrick De Geest, Aug 15 1999
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EXTENSIONS
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Definition clarified by Harvey P. Dale, Aug 26 2013
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STATUS
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approved
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