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 A155544 #9 Mar 08 2013 12:37:20 %S A155544 187,190,193,194,240,275,280,303,318,331,345,404,430,466,468,470,471, %T A155544 476,481,494,521,532,566,603,604,669,706,733,859,917,935,946,962,979, %U A155544 981,984,995,1020,1107,1117,1140,1224,1227,1230,1231,1242,1245,1246,1251,1253,1268 %N A155544 Indices of primes having three or more identical digits. %H A155544 Harvey P. Dale, <a href="/A155544/b155544.txt">Table of n, a(n) for n = 1..1000</a> %e A155544 946 is in the sequence because prime(946) = 7477 has three identical digits. %t A155544 Select[Range[1300],Max[DigitCount[Prime[#]]]>2&] (* _Harvey P. Dale_, Mar 08 2013 *) %Y A155544 Cf. A000040, A073069. %K A155544 nonn,base %O A155544 1,1 %A A155544 _Juri-Stepan Gerasimov_, Jan 24 2009 %E A155544 Edited by _N. J. A. Sloane_, Jan 30 2009 %E A155544 Definition corrected, 859, 946, 962, 979 inserted by _R. J. Mathar_, May 15 2010