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 A230857 #21 Sep 05 2024 15:43:00 %S A230857 2,13,24,1111111111124,2222222222224,111111111112222222222235, %T A230857 222222222222222222222246 %N A230857 Leading power of 10 in A006064(n). %C A230857 a(9) = ( 10^1111111111124 + 10^24 + 214 ) / 9. %C A230857 a(10) = ( 2*10^1111111111124 + 214 ) / 9. %H A230857 Max Alekseyev, <a href="/A230857/a230857.txt">Table n, expression for a(n) for n=2..100</a> %H A230857 Max A. Alekseyev and N. J. A. Sloane, <a href="https://arxiv.org/abs/2112.14365">On Kaprekar's Junction Numbers</a>, arXiv:2112.14365, 2021; Journal of Combinatorics and Number Theory 12:3 (2022), 115-155. %Y A230857 Cf. A006064. %K A230857 nonn,base %O A230857 2,1 %A A230857 _N. J. A. Sloane_, Oct 31 2013 %E A230857 Terms a(9) onward from _Max Alekseyev_, Oct 31 2013