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 A280636 #20 Jan 10 2017 07:20:52 %S A280636 111,122,133,155,166,177,326,339,515,717,818,2918,3721,5315,6742,7214, %T A280636 7642,9327,9763,11111,11333,11555,12929,13333,13535,13565,13791,13939, %U A280636 14114,14141,14242,14545,15115,15151,15353,15454,15757,16161,16565 %N A280636 Semiprime numbers whose digit string can be partitioned into three parts such that the product of the first two parts equals the third part. %C A280636 Could be called semiprime area numbers. If the first set of digits of the number is considered the length, the second set of digits of the number is considered the width, and the final set of digits of the number is considered the area, then length * width = area. %F A280636 A001358 INTERSECT A280635. %e A280636 2918 is semiprime (2*1459) and an area number (2*9 = 18). %e A280636 6742 is semiprime (2*3371) and an area number (6*7 = 42). %e A280636 Leading zeros are not allowed. %Y A280636 Cf. A088294, A280635. %K A280636 nonn,base %O A280636 1,1 %A A280636 _Randy L. Ekl_, Jan 06 2017