%I A057822
%S A057822 5,11,59,419,232792559,442720643463713815199
%N A057822 Smaller of pair of twin primes whose average is LCM[1,...,m] for some 
               m.
%F A057822 If z=A051451(n), then {z-1, z+1} are twin primes.
%e A057822 (419+421)/2=420=LCM[1,2,3,4,5,6,7] No more such primes occurs below m<2000. 
               Known values of m such that LCM[1,..,m] is a twin prime mean value 
               are as follows: {3,4,5,6,7,19,20,21,22,47,48}.
%Y A057822 Cf. A003418, A051451, A049536, A057706.
%Y A057822 Sequence in context: A104357 A104364 A057824 this_sequence A095150 A041697 
               A121170
%Y A057822 Adjacent sequences: A057819 A057820 A057821 this_sequence A057823 A057824 
               A057825
%K A057822 nonn
%O A057822 0,1
%A A057822 Labos E. (labos(AT)ana.sote.hu), Nov 08 2000