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 A245178 #6 Jul 17 2014 12:45:17 %S A245178 7,11,13,14,19,22,25,26,28,35,38,44,49,50,52,56,67,70,76,88,97,98,100, %T A245178 104,112,131,134,140,152,176,193,194,196,200,208,224,259,262,268,280, %U A245178 304,352,385,386,388,392,400,416,448,515,518,524,536,560,608,704,769,770,772,776,784,800,832,896 %N A245178 Numbers of the form (2^k+3)*2^m or (3*2^k+1)*2^m, k >= 2, m >= 0. %C A245178 Numbers whose binary expansion is 10..0110..0 or 110..010..0. %C A245178 Terms of A245179 multiplied by arbitrary powers of 2. %Y A245178 Cf. A245179. %K A245178 nonn %O A245178 1,1 %A A245178 _N. J. A. Sloane_, Jul 17 2014