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 A260711 #9 Sep 08 2022 08:46:13 %S A260711 0,8,16,32,48,64,96,128,160,192,224,256,320,384,448,512,576,640,704, %T A260711 768,832,896,960,1024,1152,1280,1408,1536,1664,1792,1920,2048,2176, %U A260711 2304,2432,2560,2688,2816,2944,3072,3200,3328,3456,3584,3712,3840,3968,4096,4352,4608,4864 %N A260711 Numbers of the form x^2 - y^2 with x >= y; x and y are odd, x + y is a power of 2. %C A260711 These binomials do not have primitive factors. %H A260711 Wikipedia, <a href="http://en.wikipedia.org/wiki/Lucas_sequence">Lucas sequence</a> %o A260711 (Magma) lst:=[0]; r:=4864; t:=1; d:=func<t | Floor(r/(4*t))>; while d(t) gt t do s:=d(t); if s mod 2 eq 1 and t mod 2 eq 1 then s-:=1; end if; if s mod 2 eq 0 and t mod 2 eq 0 then s-:=1; end if; repeat; m:=(s+t)^2-(s-t)^2; if PrimeDivisors(s) eq [2] then Append(~lst, m); end if; s-:=2; until s-t lt 1; t+:=1; end while; Sort(lst); // _Arkadiusz Wesolowski_, Dec 19 2020 %Y A260711 Subsequence of A008590. %K A260711 nonn %O A260711 1,2 %A A260711 _Arkadiusz Wesolowski_, Jul 30 2015