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 A115711 #5 Nov 21 2013 12:48:47 %S A115711 4,9,49,64,121,169,289,400,625,900,961,1156,1225,1849,2401,3136,3364, %T A115711 3481,3721,4900,5041,5329,6400,6889,7396,9604,10201,10816,11449,11881, %U A115711 12100,12544,12769,13225,13456,13924,15376,15625,16129,16384,16900 %N A115711 Squares whose digit reversal is a semiprime (A001358). %e A115711 64=8^2 and 46=2*23 is semiprime. %t A115711 Select[Range[150]^2,PrimeOmega[FromDigits[Reverse[ IntegerDigits[ #]]]]==2&] (* _Harvey P. Dale_, Sep 20 2011 *) %Y A115711 Cf. A001358, A115710. %K A115711 nonn,base %O A115711 1,1 %A A115711 _Giovanni Resta_, Jan 31 2006