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 A168608 #18 Oct 15 2013 07:00:51 %S A168608 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 A168608 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 A168608 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 A168608 Decimal expansion of average of two-digit primes. %C A168608 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 A168608 RealDigits[Mean[Prime[Range[PrimePi[11],PrimePi[99]]]],10,120][[1]] (* _Harvey P. Dale_, May 02 2013 *) %Y A168608 Cf. A000040. %K A168608 cons,nonn,base,less %O A168608 2,1 %A A168608 _Zak Seidov_, Dec 01 2009