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 A303574 #9 Dec 30 2018 04:04:51 %S A303574 5,7,5,17,45,85,73,45,85,153,153,189,313,297,189,189,313,561,561,633, %T A303574 633,633,765,765,1137,1105,633,633,633,633,633,765,1273,2145,2145, %U A303574 2289,2289,2289,2553,2553,2289,2289,2553,2553,2553,2553,2553,3069,4593,4257 %N A303574 Write the binary palindrome A303573(n) in base 10. %H A303574 Rémy Sigrist, <a href="/A303574/b303574.txt">Table of n, a(n) for n = 0..29999</a> %H A303574 Rémy Sigrist, <a href="/A303574/a303574.gp.txt">PARI program for A303574</a> %o A303574 (PARI) See Links section. %Y A303574 Cf. A230891, A303573. %K A303574 nonn,base %O A303574 0,1 %A A303574 _N. J. A. Sloane_, Apr 27 2018 %E A303574 More terms from _Rémy Sigrist_, Dec 27 2018