# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a176915 Showing 1-1 of 1 %I A176915 #8 Nov 21 2013 12:50:03 %S A176915 2,4,9,15,27,39,56,67,99,103,135,146,175,185,194,224,234,265,279,307, %T A176915 344,415,425,458,518,566,594,615,639,655,804,819,823,854,877,1015, %U A176915 1027,1045,1058,1087,1143,1226,1274,1286,1298,1314,1423,1447,1478,1482,1603 %N A176915 Average of n-th twin prime pair minus total number of prime factors of average of n-th twin prime pair. %C A176915 Prime factors are counted with multiplicity. [from Harvey P. Dale, Aug 19 2011] %F A176915 a(n)=A014574(n)-A078571(n). %t A176915 f[n_]:=Module[{mn=Mean[n]},mn-PrimeOmega[mn]]; f/@Select[Partition[ Prime[ Range[300]],2,1],Last[#]-First[#]==2&] (* _Harvey P. Dale_, Aug 19 2011 *) %K A176915 nonn %O A176915 1,1 %A A176915 _Juri-Stepan Gerasimov_, Apr 28 2010 %E A176915 Formula index, a(8), a(15) and a(23) corrected by _R. J. Mathar_, May 01 2010 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE