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 A062850 #17 Mar 03 2023 13:11:38 %S A062850 0,1,6,7,17,18,30,34,49,60,90,102,108,119,126,180,203,204,210,238,269, %T A062850 306,420,510,538,540,612,630,882,1020,1050,1076,1314,1530,1638,2040, %U A062850 2100,2628,2711,3060,3281,3570,3996,4410,4573,6120,6562,7097,7140,7884,7992,8100,8190,9146,9180,9720 %N A062850 When expressed in base 2 and then interpreted in base 9, is a multiple of the original number. %e A062850 7 in base 2 is 111, which interpreted in base 9 is 91 = 13*7. %t A062850 Select[Range[10000], Divisible[FromDigits[IntegerDigits[#,2], 9], #]&] (* _Harvey P. Dale_, Jan 04 2011 *) %K A062850 base,nonn %O A062850 1,3 %A A062850 _Erich Friedman_, Jul 21 2001 %E A062850 Extended by _Harvey P. Dale_, Jan 04 2011 %E A062850 Offset changed to 1 by _Georg Fischer_, Mar 03 2023