id:A069809 - OEIS Search Results

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GCD(n,phi(n))=tau(n).

+0
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1, 8, 9, 18, 24, 40, 56, 84, 88, 104, 136, 152, 156, 184, 228, 232, 248, 296, 328, 344, 360, 372, 376, 424, 444, 472, 488, 516, 536, 568, 584, 632, 664, 712, 732, 776, 792, 804, 808, 824, 856, 872, 876, 904, 948, 1016, 1048, 1096, 1112, 1164, 1192, 1208 (list; graph; listen)

	OFFSET	`1,2`
	PROGRAM	`(PARI) for(n=1, 1592, if(gcd(n, eulerphi(n))==numdiv(n), print1(n, ", ")))`
	CROSSREFS	`Sequence in context: A057104 A095191 A050706 this_sequence A067544 A022313 A120311` `Adjacent sequences: A069806 A069807 A069808 this_sequence A069810 A069811 A069812`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 30 2002`

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Last modified September 7 12:28 EDT 2008. Contains 143483 sequences.

AT&T Labs Research