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%I #18 Oct 15 2013 07:00:51
%S 4,9,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
%T 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
%U 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6
%N Decimal expansion of average of two-digit primes.
%C Primes between 10 and 100: 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, the number of which is 21, and their sum is 1043. Therefore: 1043/21 = 49.66666666666666666666666666666666...
%t RealDigits[Mean[Prime[Range[PrimePi[11],PrimePi[99]]]],10,120][[1]] (* _Harvey P. Dale_, May 02 2013 *)
%Y Cf. A000040.
%K cons,nonn,base,less
%O 2,1
%A _Zak Seidov_, Dec 01 2009
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