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 A230304 #3 Oct 26 2013 13:37:13 %S A230304 101,10000000000001, %T A230304 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 %N A230304 a(n) = 10^( (10^n-1)/9 + n) + 1. %C A230304 Makowski observes that A230093(a(n)) >= 2 for all n >= 1. %D A230304 Makowski, Andrzej. On Kaprekar's "junction numbers''. Math. Student 34 1966 77 (1967). MR0223292 (36 #6340) %H A230304 <a href="/index/Coi#Colombian">Index entries for Colombian or self numbers and related sequences</a> %Y A230304 Cf. A006064, A230093, A230094, A230100. %K A230304 nonn,base %O A230304 1,1 %A A230304 _N. J. A. Sloane_, Oct 26 2013