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 A153055 #3 Mar 31 2012 10:29:57 %S A153055 11,13,27,29,45,53,54,59,61,79,83,101,103,106,109,115,121,125,155,158, %T A153055 163,166,173,181,187,199,202,206,211,212,213,218,237,251,310,326,329, %U A153055 345,346,362,369,377,393,398,407,409,412,422,436,441,459,563,575,581 %N A153055 Numbers n such that the binary expansion of n is a substring of the binary expansion of 1/n. %e A153055 a(2) = 13 because bin(13)=1101 and bin(1/13)=.000100111011(repeats infinitely) and 1101 appears in the binary expansion of the reciprocal. %K A153055 base,easy,nonn %O A153055 1,1 %A A153055 _Gil Broussard_, Dec 17 2008