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 A333614 #14 May 04 2020 00:15:42 %S A333614 0,11,22,33,44,55,66,77,88,99,102,110,121,134,145,153,167,178,186,201, %T A333614 212,220,235,243,254,268,276,287,304,313,326,330,341,352,365,379,398, %U A333614 403,414,425,432,440,451,469,497,506,515,523,531,542,550,564,589,605,616,624,637,648,659 %N A333614 Lexicographically first sequence of nonnegative integers such that no two terms share all but one digit in common, nor does interchanging any two adjacent digits in any term change it into another term of the sequence. %C A333614 The rules of this sequence are designed to decrease the likelihood of confusing any two numbers in the sequence. This would be ideal, for example, in the case of generating account numbers. %H A333614 Rémy Sigrist, <a href="/A333614/a333614.gp.txt">PARI program for A333614</a> %e A333614 a(1) = 0 because it is the smallest nonnegative integer. %e A333614 a(2) = 11 because all integers between 1 and 10 only differ from 0 by one digit. %e A333614 a(3) = 22 because all integers between 12 and 21 only differ from 11 by one digit. %e A333614 a(11) = 102 because 101 becomes 011 when interchanging the first two adjacent digits. %o A333614 (PARI) See Links section. %Y A333614 Cf. A008585 (binary analog). %K A333614 nonn,base %O A333614 1,2 %A A333614 _Aidan Clarke_, Mar 28 2020