Search: id:A090276
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%I A090276
%S A090276 2,7,3,33,9,77,33,999,1111111,3,33,777777,111111111,77,333333,111,
%T A090276 99999999,3333333333,777777,1,33333333333333333333,
%U A090276 999999999999999999999999999999999999,99999999,999999999999999999999999999999999999999999,
               3333333333333333333333333
%N A090276 Least number with identical digits such that the concatenation a(n) a(n-1) 
               ...a(2)a(1) a(2) ... a(n-1) a(n) is a prime.
%C A090276 The resulting primes are given in A090275.
%e A090276 2,727,37273,... etc. are primes.
%Y A090276 Cf. A090275.
%Y A090276 Sequence in context: A089124 A117809 A052091 this_sequence A090564 A079072 
               A004584
%Y A090276 Adjacent sequences: A090273 A090274 A090275 this_sequence A090277 A090278 
               A090279
%K A090276 base,nonn
%O A090276 1,1
%A A090276 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 28 2003
%E A090276 More terms from Sam Alexander (amnalexander(AT)yahoo.com), Jan 06 2005
%E A090276 Many further terms from David Wasserman (wasserma(AT)spawar.navy.mil), 
               Oct 27 2005

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