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 A162822 #13 Feb 21 2019 23:26:03
%S A162822 9,12,18,20,24,27,28,30,32,33,34,35,36,37,38,39,40,42,44,45,48,52,54,
%T A162822 60,63,72,84,90,108,117,144,180,198,252,360,468,684,1332
%N A162822 Positive numbers k such that 36*k/(36-k) are integers.
%C A162822 The number k=36 is explicitly included, treating the result of division through zero as an integer.
%C A162822 Row 36 of A191973.
%p A162822 for m from 1 to 1332 do if(m=36 or m*36 mod (m-36) = 0)then printf("%d, ", m): fi: od: # _Nathaniel Johnston_, Jun 22 2011
%t A162822 f[a_,b_]:=(a*b)/(a-b); a=36;lst={};Do[If[f[a,n]==IntegerPart[f[a,n]], AppendTo[lst,n]],{n,9!}];lst
%t A162822 Sort[Join[{36},Select[Range[1500],IntegerQ[(36#)/(36-#)]&]]] (* _Harvey P. Dale_, Mar 23 2011 *)
%Y A162822 Cf. A162688, A162689, A162690, A162691, A162692, A162693, A162694, A162817, A162818, A162819, A162820, A162821, A191973.
%K A162822 nonn,fini,full,easy
%O A162822 1,1
%A A162822 _Vladimir Joseph Stephan Orlovsky_, Jul 13 2009
%E A162822 Keywords fini,full added by _R. J. Mathar_, Jul 31 2009