A162819 Positive numbers n such that 48*n/(48+n) are integers.

16, 24, 48, 80, 96, 144, 208, 240, 336, 528, 720, 1104, 2256

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Jul 13 2009

Keywords

• nonn
• fini
• full

Crossrefs

Cf. A162688, A162689, A162690, A162691, A162692, A162693, A162694, A162817, A162818

Cf. A127730. [From Franklin T. Adams-Watters, Aug 07 2009]

Programs

Mathematica

f[a_,b_]:=(a*b)/(a+b); a=48;lst={};Do[If[f[a,n]==IntegerPart[f[a,n]], AppendTo[lst,n]],{n,9!}];lst
Select[Range[2300],IntegerQ[(48#)/(48+#)]&] (* Harvey P. Dale, Dec 18 2018 *)

Extensions

Keywords fini,full added by R. J. Mathar, Jul 31 2009