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 A179439 #6 Jan 06 2013 12:24:39 %S A179439 2,3,4,5,6,8,9,10,11,12,13,14,15,17,20,21,22,24,25,26,27,29,30,33,34, %T A179439 35,36,37,38,39,40,41,42,43,44,45,46,48,49,50,51,52,53,54,55,56,57,58, %U A179439 59,61,62,64,65,66,67,68,69,70,71,72,73,75,76,77,78,79,80,81,82,83,84,85 %N A179439 Positive numbers not of the form x^5 - y^2. %e A179439 19 can be expressed as 55^5 - 22434^2, so 19 is not in the sequence. %Y A179439 Cf. A152412, A177760, A177761, A177764, A177765, A177859. %K A179439 nonn %O A179439 1,1 %A A179439 _Artur Jasinski_, Jul 14 2010 %E A179439 Edited by _Arkadiusz Wesolowski_, Jan 05 2013