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.

30, 120, 210, 420, 330, 840, 294, 1260, 1080, 1320, 690, 2520, 318, 1470, 2310, 3360, 0, 3780, 0, 4620, 1290, 2760, 1410, 5460, 3000, 1590, 7560, 5880, 1770, 9240, 0, 10080, 4830, 1236, 3234, 10920, 894, 0, 2370, 13860, 2490, 6090, 1038, 9660, 11880

Offset: 1

Author

Reinhard Zumkeller, Oct 07 2005

Keywords

• nonn

Comments

Each term is a multiple of 6. [Max Alekseyev, Mar 01 2010]

Examples

			a(1) = A020488(A112954(1)) = A020488(7) = 30;
a(2) = A062516(A112954(2)) = A062516(9) = 120;
a(3) = A063469(A112954(3)) = A063469(10) = 210;
a(4) = A063470(A112954(4)) = A063470(9) = 420.
		

Links

• Donovan Johnson, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A112954.

Cf. A175667. [Enrique Pérez Herrero, Oct 22 2010]

Extensions

More terms from Max Alekseyev, Mar 01 2010