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 A291461 #16 Feb 24 2018 11:50:07 %S A291461 1,512,91125,26198073,12519490248,20301732352,87824421125,93824221184, %T A291461 121213882349,128711132649,162324571375,171323771464,368910352448, %U A291461 19902511000000,87782935806307,171471879319616,220721185826504,470511577514952,2977097087043793,9063181647017784 %N A291461 Kaprekar triples: q^3 = x*10^2n + y*10^n + z, with q = x + y + z and 10^n > q > 10^(n-1) (q = 1 allowed for n = 1). %H A291461 Hans Havermann, <a href="/A291461/b291461.txt">Table of n, a(n) for n = 1..1000</a> %F A291461 a(n) = A006887(n)^3. %o A291461 (PARI) m=10; for(q=1,1e4,if(q<m,q==sumdigits(q^3,m)&&print1(q^3,","),m*=10)) \\ See A006887 for slightly more efficient code. %Y A291461 Cf. A006887. %K A291461 nonn,base %O A291461 1,2 %A A291461 _M. F. Hasler_, Aug 24 2017