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 A229129 #7 Sep 18 2013 13:35:41 %S A229129 4,6,9,22,33,55,111,121,141,202,303,323,505,515,535,545,626,707,717, %T A229129 737,939,949,959,1111,1441 %N A229129 Digital clock palindromic semiprimes. %C A229129 Palindromic semiprimes possible on a 24-hour digital clock, with no seconds. This is similar to A229107 as semiprimes (A001358) are to prime A000040, except this sequence has no seconds. %F A229129 Digital clock semiprimes (A129336) INTERSECTION Palindromes in base 10 (A002113). %Y A229129 Cf. A001358, A002113, A229107. %K A229129 nonn,base,fini,full %O A229129 1,1 %A A229129 _Jonathan Vos Post_, Sep 14 2013