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 A216399 #16 Jun 21 2022 05:08:00 %S A216399 0,35000000,500000000,535000000,9465000000,9500000000,9965000000, %T A216399 10000000000,10500000000,19465000000,19500000000,19965000000, %U A216399 20000000000,20500000000,29465000000,29500000000,29965000000 %N A216399 Numbers k such that the number of times digit 'm' used for writing the decimal representation of the numbers from 1 to k is equal to k for more than one value of m in the range m = 1 to 9. %C A216399 Related to A216398. %H A216399 V. Raman, <a href="/A216399/b216399.txt">Table of n, a(n) for n = 1..34</a> %Y A216399 Cf. A014778, A101639, A101640, A101641, A130427, A130428, A130429, A130430, A130431, A130432, A216398. %K A216399 nonn,base,fini,full %O A216399 1,2 %A A216399 _V. Raman_, Sep 06 2012