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 A113610 #8 Aug 10 2025 18:31:53
%S A113610 0,4,6,18,3,18,9,9,40,3,35,27,6,27,43,55,6,50,36,9,65,27,70,84,36,3,
%T A113610 18,9,9,93,27,40,12,81,6,50,53,36,58,70,9,126,12,45,18,68,83,27,12,18,
%U A113610 55,6,99,55,58,70,9,65,45,12,135,147,27,6,27,126,50,99,15,27,70,84,68,80,36
%N A113610 Sum of digits of all composite numbers between prime(n) and prime(n+1).
%C A113610 Conjecture: For n > 9 if a(n) > a(n+1) < a(n+2) then prime(n) and prime(n+1) form a twin prime pair.
%e A113610 2 '' 3 '4' 5 '6' 7 '8910' 11 '12' 13 '141516' 17 '18' 19 '202122' 23 '2425262728' 29,...
%t A113610 Table[Total[Flatten[IntegerDigits/@Range[Prime[n]+1,Prime[n+1]-1]]],{n, 100}] (* _Zak Seidov_, Nov 13 2009 *)
%Y A113610 Cf. A175038. - _Zak Seidov_, Nov 13 2009
%K A113610 base,easy,nonn
%O A113610 1,2
%A A113610 _Amarnath Murthy_, Nov 09 2005
%E A113610 More terms from Elizabeth A. Blickley (Elizabeth.Blickley(AT)gmail.com), Mar 10 2006