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 A241792 #11 Oct 30 2014 12:17:09 %S A241792 102738945,120784653,120893475,124875306,126794850,129854670, %T A241792 137904528,142087653,143287056,147069825,149826705,152783940, %U A241792 153694278,160249753,162495378,168370425,173249805,189725460,192540876,193405278,197438256,207193546,230469715 %N A241792 Triangular numbers which have one or more occurrences of exactly nine different digits. %C A241792 The first term having a repeated digit is 1004976528. %H A241792 Colin Barker, <a href="/A241792/b241792.txt">Table of n, a(n) for n = 1..1500</a> %o A241792 (PARI) s=[]; for(n=0, 40000, if(#vecsort(eval(Vec(Str(n*(n+1)/2))), , 8)==9, s=concat(s, n*(n+1)/2))); s %Y A241792 Cf. A045914, A062691, A162304, A241787, A241788, A241789, A241790, A241791, A241812. %Y A241792 Cf. A000217. %K A241792 nonn,base %O A241792 1,1 %A A241792 _Colin Barker_, Apr 28 2014