A130669 Smallest k such that phi(x) = k has exactly n odd solutions.

1, 6, 24, 60, 144, 72, 216, 480, 600, 240, 432, 1152, 1296, 1080, 4608, 2016, 720, 2520, 2400, 1440, 5184, 4032, 2880, 5280, 7776, 2160, 5760, 21840, 7560, 9600, 6720, 16560, 5040, 15552, 6480, 13440, 10800, 11520, 20736, 4320, 18144, 12096, 28512, 16800

Offset: 1

Author

Franz Vrabec, Jun 27 2007

Keywords

• nonn

Examples

			a(3) = 24 because there are 3 odd solutions (35, 39, 45) to phi(x) = 24 and for every k < 24 the number of odd solutions to phi(x) = k is unequal to 3.
		

Links

• Vladeta Jovovic and Donovan Johnson, Table of n, a(n) for n = 1..1000 (first 100 terms from Vladeta Jovovic)

Crossrefs

Cf. A007374, A130670.