This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A173448 #10 Oct 18 2014 11:04:10 %S A173448 13,151,353,139,101,70451,97,15193,3821,9319,7717,103619,10883,18353, %T A173448 108821,701,10091,99251,78497,3559,930043,99787,18671,12251,711751, %U A173448 9293,10861,121921,103099,986189,74287,796567,323003,108707,365779,192377,393901,380251,98479,114343,329729 %N A173448 Smallest prime(k) such that the concatenation prime(k)//prime(k+1)//...//prime(k+n-1) represents an emirp. %e A173448 a(5) = 101 because 101103107109113 = A086041(6) is the smallest emirp formed by concatenating 5 consecutive primes (101, 103, 107, 109, 113). %Y A173448 Cf. A006567, A167518, A030996. %K A173448 nonn,base %O A173448 1,1 %A A173448 _Lekraj Beedassy_, Feb 18 2010 %E A173448 Keyword:base added and definition reworded by _R. J. Mathar_, Feb 24 2010 %E A173448 More terms from _Sean A. Irvine_, Nov 14 2010