cp's OEIS Frontend

A338607 Resistance values R < 1 ohm, multiplied by a common denominator 232792560 (= A338600(7)), that can be obtained from a network of exactly 7 one-ohm resistors, but not from any network with fewer than 7 one-ohm resistors.

%I A338607 #7 Nov 16 2020 02:09:13
%S A338607 33256080,42325920,49884120,53721360,62078016,64664600,68468400,
%T A338607 71628480,72747675,73513440,81477396,82162080,83140200,85765680,
%U A338607 88682880,90530440,95855760,98017920,101846745,106696590,110270160,110853600,121938960,122522400,126095970
%N A338607 Resistance values R < 1 ohm, multiplied by a common denominator 232792560 (= A338600(7)), that can be obtained from a network of exactly 7 one-ohm resistors, but not from any network with fewer than 7 one-ohm resistors.
%C A338607 The list of the A338197(7)/2 = 57 resistance values < 1 ohm is A338587(n)/A338597(n). a(n) = 232792560 * [1/7, 2/11, 3/14, 3/13, 4/15, 5/18, 5/17, ..., 19/21, 11/12, 12/13, 13/14, 14/15, 15/16, 18/19].
%H A338607 Hugo Pfoertner, <a href="/A338607/b338607.txt">Table of n, a(n) for n = 1..57</a>
%Y A338607 Cf. A180414, A338197, A338587, A338597, A338600, A338605, A338606, A338608, A338609.
%K A338607 nonn,fini,full
%O A338607 1,1
%A A338607 _Hugo Pfoertner_, Nov 05 2020