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 A116063 #2 Mar 30 2012 17:40:36 %S A116063 22,33,55,77,111,1111,1133,1177,1199,3377,4411,4499,5533,5599,6611, %T A116063 6677,7711,7799,8899,9977,11111,11199,11333,11555,22233,22255,22299, %U A116063 22333,22999,33322,44222,44333,44411,44477,44999,55111,55222,55577 %N A116063 Semiprimes (A001358) made of nontrivial runs of identical digits. %C A116063 A run of length 1 is trivial. %e A116063 44477 = 79*563 %Y A116063 Cf. A001358, A033023, A116062. %K A116063 nonn,base %O A116063 1,1 %A A116063 _Giovanni Resta_, Feb 13 2006