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 A253056 #5 Jan 01 2015 14:56:01 %S A253056 15,27,35,39,45,49,51,55,57,63,65,69,75,77,81,87,91,99,105,117,119, %T A253056 121,123,125,133,135,141,143,145,147,153,155,159,161,165,169,171,175, %U A253056 183,185,187,189,195,201,203,205,207,209,215,217,219,221,225,231,235,243 %N A253056 A253055, sorted. %C A253056 It would be nice to have a characterization of these numbers that is independent of A098550. %Y A253056 Cf. A098550, A253055, A251545. %K A253056 nonn %O A253056 1,1 %A A253056 _N. J. A. Sloane_, Jan 01 2015