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 A242826 #12 May 26 2014 23:58:19 %S A242826 7,769,769230769,769230769230769230769, %T A242826 769230769230769230769230769230769 %N A242826 Primes formed by the initial digits of the decimal expansion of 1/13, starting at the first nonzero digit in the expansion. %Y A242826 Cf. A021017. %Y A242826 Corresponding sequences for 1/k: A242824 (k=7), A093676 (k=12), A242827 (k=14), A242828 (k=17), A242833 (k=19). %K A242826 nonn,base %O A242826 1,1 %A A242826 _Felix Fröhlich_, May 23 2014