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A173448 Smallest prime(k) such that the concatenation prime(k)//prime(k+1)//...//prime(k+n-1) represents an emirp. 0

%I #10 Oct 18 2014 11:04:10

%S 13,151,353,139,101,70451,97,15193,3821,9319,7717,103619,10883,18353,

%T 108821,701,10091,99251,78497,3559,930043,99787,18671,12251,711751,

%U 9293,10861,121921,103099,986189,74287,796567,323003,108707,365779,192377,393901,380251,98479,114343,329729

%N Smallest prime(k) such that the concatenation prime(k)//prime(k+1)//...//prime(k+n-1) represents an emirp.

%e a(5) = 101 because 101103107109113 = A086041(6) is the smallest emirp formed by concatenating 5 consecutive primes (101, 103, 107, 109, 113).

%Y Cf. A006567, A167518, A030996.

%K nonn,base

%O 1,1

%A _Lekraj Beedassy_, Feb 18 2010

%E Keyword:base added and definition reworded by _R. J. Mathar_, Feb 24 2010

%E More terms from _Sean A. Irvine_, Nov 14 2010

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Last modified April 23 02:53 EDT 2024. Contains 371906 sequences. (Running on oeis4.)