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 A032535 #24 Oct 25 2019 17:09:44 %S A032535 1,21,273,2231,10101,28261,611123,1200341,3427673,8108919,38636301, %T A032535 51484647,2202416417,11102657671,42822560781 %N A032535 Odd numbers that, when expressed in base 2 and then interpreted in base 10, yield a multiple of the original number. %e A032535 273 is a term: 273_10 = 100010001_2; 100010001 = 273*366337. - _Jon E. Schoenfield_, Oct 25 2019 %t A032535 Select[Range[1, 10^6, 2], Mod[ FromDigits@ IntegerDigits[#, 2], #] == 0 &] (* _Giovanni Resta_, Jul 12 2016 *) %Y A032535 = odd(A032533). See also A032532 for explanation. %K A032535 nonn,base,more %O A032535 1,2 %A A032535 _Patrick De Geest_, Apr 15 1998 %E A032535 a(13)-a(15) from _Giovanni Resta_, Jul 12 2016