%I A054681
%S A054681 2,139,1627,18839,123229,776257,3873011,23884639,36539311,196943081,
%T A054681 452942827,73712513057,154351758091,154351758091,4010803176619,
%U A054681 6987191424553
%N A054681 Start of a run of consecutive primes of length n each ending with the 
               same digit.
%C A054681 n consecutive primes differ by a multiple of 10 starting at a(n).
%C A054681 n consecutive primes that are congruent mod 10, i.e. they are not necessarily 
               in arithmetic progression.
%H A054681 J. K. Andersen, <a href="http://users.cybercity.dk/~dsl522332/math/congruent-primes.htm">
               Consecutive Congruent Primes</a>.
%H A054681 Mark Underwood's <a href="http://groups.yahoo.com/group/primenumbers/
               message/12794">Problem posed on the "PrimeNumbers" yahoogroup</a>
%e A054681 a(2)=139 because 139 and 149 are the first consecutive primes to share 
               a terminal digit.
%o A054681 (PARI) i=1; s=0; d=0; l=0; forprime(p=1,500000,if(p%10==d,l++,if(l>=i,
               print(s); i++); s=p; d=p%10; l=1)) (Carmody)
%Y A054681 Sequence in context: A157072 A051029 A084560 this_sequence A152509 A094482 
               A101232
%Y A054681 Adjacent sequences: A054678 A054679 A054680 this_sequence A054682 A054683 
               A054684
%K A054681 more,nonn,base
%O A054681 1,1
%A A054681 Jeff Burch (gburch(AT)erols.com), Apr 18 2000
%E A054681 More terms from Phil Carmody (pc+oeis(AT)asdf.org), Jun 27 2003
%E A054681 Further from Jens Kruse Andersen (jens.k.a(AT)get2net.dk), Jun 03 2006