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 A249765 #10 Nov 22 2014 00:06:33 %S A249765 7,23957,56483,74651,316782,13594764,14473747,30056837 %N A249765 Numbers that divide the concatenation, in descending order, of their anti-divisors. %e A249765 Anti-divisors of 7 are and 2, 3, 5 and their concatenation in descending order is 532. Finally, 532 / 7 = 76. %p A249765 P:=proc(q) local a,k,n; for n from 3 to q do a:=0; %p A249765 for k from n-1 by -1 to 2 do if abs((n mod k)-k/2)<1 then a:=a*10^(ilog10(k)+1)+k; fi; od; %p A249765 if type(a/n,integer) then print(n); fi; od; end: P(10^9); %Y A249765 Cf. A066272, A069872, A224930, A240265, A249764. %K A249765 nonn,base,hard,more %O A249765 1,1 %A A249765 _Paolo P. Lava_, Nov 06 2014 %E A249765 a(5)-a(8) from _Chai Wah Wu_, Nov 21 2014