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A112955 Greatest number m such that phi(m) = n*tau(m), with phi=A000010 and tau=A000005; a(n)=0 if no such m exists.

%I A112955 #14 Oct 18 2019 16:48:14
%S A112955 30,120,210,420,330,840,294,1260,1080,1320,690,2520,318,1470,2310,
%T A112955 3360,0,3780,0,4620,1290,2760,1410,5460,3000,1590,7560,5880,1770,9240,
%U A112955 0,10080,4830,1236,3234,10920,894,0,2370,13860,2490,6090,1038,9660,11880
%N A112955 Greatest number m such that phi(m) = n*tau(m), with phi=A000010 and tau=A000005; a(n)=0 if no such m exists.
%C A112955 Each term is a multiple of 6. [_Max Alekseyev_, Mar 01 2010]
%H A112955 Donovan Johnson, <a href="/A112955/b112955.txt">Table of n, a(n) for n = 1..10000</a>
%e A112955 a(1) = A020488(A112954(1)) = A020488(7) = 30;
%e A112955 a(2) = A062516(A112954(2)) = A062516(9) = 120;
%e A112955 a(3) = A063469(A112954(3)) = A063469(10) = 210;
%e A112955 a(4) = A063470(A112954(4)) = A063470(9) = 420.
%Y A112955 Cf. A112954.
%Y A112955 Cf. A175667. [_Enrique Pérez Herrero_, Oct 22 2010]
%K A112955 nonn
%O A112955 1,1
%A A112955 _Reinhard Zumkeller_, Oct 07 2005
%E A112955 More terms from _Max Alekseyev_, Mar 01 2010