%N Number of different resistances that can be obtained by combining n one ohm resistors.
%D Joel Karnofsky, Technology Review's Puzzle Corner, Oct 3, 2003
%H Joel Karnofsky, <a href="https://web.archive.org/web/20111123142636/http://www.cs.nyu.edu/~gottlieb/tr/2003-oct-3.pdf">A problem from Technology Review's Puzzle Corner, Oct 3, 2003</a>
%A _Vaclav Kotesovec_, Sep 02 2010
%E Broken link fixed by _Vaclav Kotesovec_, Sep 29 2014