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 A115710 #4 Mar 03 2013 09:36:19 %S A115710 4,9,10,46,94,121,169,526,961,982,1042,1273,1405,1843,4069,4633,5221, %T A115710 6313,6511,6937,9235,9481,9886,10201,10609,12538,12769,14023,16171, %U A115710 16327,16582,16723,18085,18463,18811,40219,42817,42931,44353,44521 %N A115710 Semiprimes (A001358) whose digit reversal is a square. %e A115710 46=2*23 is semiprime and 64=8^2. %t A115710 Select[Range[50000],PrimeOmega[#]==2&&IntegerQ[Sqrt[FromDigits[ Reverse[ IntegerDigits[ #]]]]]&] (* _Harvey P. Dale_, Mar 03 2013 *) %Y A115710 Cf. A001358, A115711. %K A115710 nonn,base %O A115710 1,1 %A A115710 _Giovanni Resta_, Jan 31 2006