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 A104603 #3 Jun 12 2015 08:38:55 %S A104603 3,10,36,544,18518801667747479552 %N A104603 Numbers M such that M = m + 2^k = m * b(k) for m < 2^k where b is A050376. %F A104603 m = 2^k / (b_k -1) %e A104603 36 = 4 + 2^5 = 4 * b(5) where b(5)=9. %K A104603 nonn %O A104603 1,1 %A A104603 _Thomas Ordowski_, Apr 21 2005