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A179911
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Primes with three embedded primes.
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2
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113, 131, 179, 197, 223, 233, 239, 257, 271, 283, 293, 311, 313, 337, 347, 353, 359, 367, 397, 431, 479, 547, 571, 593, 613, 617, 653, 719, 733, 739, 743, 773, 797, 823, 853, 937, 953, 971, 1013, 1031, 1097, 1103, 1117, 1129, 1151, 1163, 1213, 1217, 1229
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listen;
history;
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internal format)
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OFFSET
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1,1
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COMMENTS
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A079066(a(n)) = 3.
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LINKS
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Reinhard Zumkeller, Table of n, a(n) for n = 1..1000
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MATHEMATICA
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f[n_] := Block[ {id = IntegerDigits@n}, len = Length@ id - 1; Count[ PrimeQ@ Union[ FromDigits@# & /@ Flatten[ Table[ Partition[ id, k, 1], {k, len}], 1]], True] + 1]; Select[ Prime@ Range@ 210, f@# == 4 &]
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PROG
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(Haskell)
import Data.List (elemIndices)
a179911 n = a179911_list !! (n-1)
a179911_list = map (a000040 . (+ 1)) $ elemIndices 3 a079066_list
-- Reinhard Zumkeller, Jul 19 2011
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CROSSREFS
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Cf. A039996, A079397, A033274, A034844, A092621, A179909 - A179919, A033274.
Sequence in context: A180441 A180407 A163760 * A344627 A187867 A216288
Adjacent sequences: A179908 A179909 A179910 * A179912 A179913 A179914
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KEYWORD
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base,nonn
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AUTHOR
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Robert G. Wilson v, Aug 01 2010
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STATUS
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approved
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