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 A164832 #2 Mar 30 2012 17:36:45 %S A164832 0,10,100,1020,10230,102340,1023450,10234560,102345670,1023456780, %T A164832 10234567889 %N A164832 Least nonnegative integer k such that the decimal representations of k and k+1 have n distinct digits in common. %C A164832 Finding a(10), the final term, could be a simple but instructive puzzle. %C A164832 a(1) through a(9) is a subsequence of A121030. a(0) through a(9) is a subsequence of A107411. %F A164832 For 1 <= n <= 10, a(n) is the least k such that A076489(k) = n. (This would be true for n = 0 also if A076489 considered nonnegative integers, having another initial 0 term and offset 0.). %e A164832 a(10) = 10234567889 because 10234567889 and 10234567890 have all 10 decimal digits in common and this property does not hold for any smaller positive integer. %Y A164832 Cf. A076489, A121030, A107411. %K A164832 base,easy,fini,full,nonn %O A164832 0,2 %A A164832 _Rick L. Shepherd_, Aug 27 2009