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 A118592 #6 Apr 08 2013 01:44:05
%S A118592 11,101,167,211,257,347,431,523,541,617,743,761,853,1423,1427,1607,
%T A118592 1753,1973,2011,2213,2237,2341,2417,2543,2617,2671,2819,2837,3137,
%U A118592 3407,3461,3517,3571,3719,3847,4013,4127,4211,4217,4637,4673,4691
%N A118592 Compound prime numbers. A prime is compound if its decimal digits can be divided into two contiguous subsets with equal sum.
%C A118592 Relates to the palindromic primes.
%e A118592 40127 because 4+0+1+2=7
%t A118592 First[Last[Reap[i = 1; mx = 10^4; While[i <= mx, pr = Prime[i]; prdig = IntegerDigits[pr]; prlen = Length[prdig]; j = 1; While[j < prlen, prLeft = Take[prdig, {1, j}]; prRight = Take[prdig, {j + 1, prlen}]; If[Total[prLeft] != Total[prRight], j++; Continue[], Sow[pr]; Break[]]; ]; i++; ]; ]]]
%Y A118592 Cf. A082435 and A083967.
%K A118592 easy,nonn,base
%O A118592 0,1
%A A118592 Janos Lobb (janos(AT)lobb.com), May 17 2006