id:A069185 - OEIS Search Results

Search: id:A069185

Displaying 1-1 of 1 results found.

page 1

Numbers n such that n=phi(n)*core(n) where phi(x) is the Euler totient function and core(x) the square-free part of x (the smallest integer such that x*core(x) is a square).

+0
1

1, 2, 8, 12, 32, 48, 108, 128, 192, 432, 512, 768, 972, 1728, 2048, 3072, 3888, 6912, 8192, 8748, 12288, 15552, 27648, 32768, 34992, 49152, 62208, 78732, 110592, 131072, 139968, 196608, 248832, 314928, 442368, 524288, 559872 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`{1} union {numbers of form 2^(2u+1)} union {numbers of form 4^(u+1)*3^(2v+1)} u, v>=0. - Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 31 2004`
	CROSSREFS	`Sequence in context: A047174 A048074 A126775 this_sequence A037197 A125712 A062290` `Adjacent sequences: A069182 A069183 A069184 this_sequence A069186 A069187 A069188`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 14 2002`

page 1

Search completed in 0.002 seconds

Last modified December 6 11:04 EST 2009. Contains 170427 sequences.

AT&T Labs Research